What are welcoming dreams about?

I dreamt that i was in a casual hangout and this person i hated (she died last year) suddenly arrived. I asked her "Arent you supposed to be dead?" and she explained that she faked her death. I spent the rest of the dream telling her she was not welcome, to leave and wishing she was really dead.

The odd part is that she died about a year ago and i havent spoken or heard about her in months. I dont understand this sudden dream.

Last night I (20y.M) had a dream about my ex, someone who i just cant let go of no matter how much time passes by.

It started with me hanging out with my brother and some friends in a large apartment complex when i find a party going on in one of them. I alone enter and as i turn around i notice that all of my buds had vanished. Turning back around to the door, a girl greets me, looks about my age, although i have never seen her before. She welcomes me inside and tells me its an orgy party celebrating a certain someones 21st birthday. This had me in shock and i didnt know how to respond before this girl took my hand and began leading further into the apartment, which had now expanded into the size of your average middle class house. Going into the living room it was revealed the person whom was throwing the party was my ex, who claimed "the guest of honor had arrived." All around the room were countless girls, who were all of similar age, wearing skimpy dresses or hardly nothing at all; all of them doing something erotic or teasing.

I was confused, then she told me i could have my way with any of the girls in the room except for her, but then something in me clicked... i refused. I told her the one person i would do anything with *was* her, so... she offered a deal: "if you can satisfy every girl in this room and still have enough energy, then i will participate." I accepted then prepared myself for the mob approaching me, each one with a hungry expression on their faces.
Almost embarrassingly frightened, i began, one after one after one. Orgasm after orgasm after orgasm. After a while i thought to myself i had to have gone through over a dozen girls but the mob just wont thin and my ex just appears further each time; and with each time, my stamina depletes, but my resolve does not.

I continue to try until i black out and i awake irl with a very empty feeling in my chest.

So in my dream I was right at the edge of my neighborhood, where it meets with the highway. I think I remember seeing two people near me. I think one had a dog. I'm having a hard time remembering but I think I didn't want to be seen, like I had to be sneaky. No reaction from them. If I remember right I didn't like it when the dog was following me around because again I didn't want to be seen and someone seeing the dog then me. I made it to my house. I don't think other people were outside in my neighborhood. I looped through my backyard first to go through the backdoor. I think that is when the dog found me again. Even in the dream I was typing out the dream on Reddit.

Last night I had a sleep paralysis dream, I was mostly asleep but knew I was talking. It was very dark and I was in bed. I was a different person a man; Lanky obscure face. I was trying to do something(started trying to get out of bed) when an old dead version of myself came out of nowhere and fell on top of me. There was an emanation of malice coming out of it as it pressed down on me with unnatural force. I was panicked and struggled against it to get it off of me while I fretfully cried "no, not you". I was woken up by my partner after that point where they told me my dream sounded scary( they could hear me as I actually cried out). Any interpretations are welcome. Thank you.

Edit: for clarification when I described the corpse as old I meant an old man version of me that was dead as well as an old blackened withered corpse. Also it may help to know I am actually a woman.

I had a dream that I was with my boyfriend and a random female character from a show. We were adventure hiking in Madagascar -- seemed we were in the jungle. We came up a steep rock drop and they geared up with ropes and harnesses to lower themselves down it. I was excited, thinking we'd be rock climbing (I like climbing) but when I realized we were just navigating down, I ignored safety and kind of recklessly leapt my way down. I remember doing dangerous balancing acts and the like, thinking "is this a good idea? Am I going to die?".

Then we entered this ancient temple. It was kind of buried in sand, I think, but we found an entrance. Inside there was this cool library that struck me as abandoned. Weird it struck me as abandoned as overall we were in some lost-to-time ancient structure. I remember the other two were wandering the library and this one, out of place book on a pedestal caught my eye. It looked pretty new age and I debated going up to it but instead looked past the library to find the inside of the structure. There were beautiful green, greek-style pillars and it seemed a massive room that went a long way down. I tried to draw the others attention to it, like, "screw the library!". The random woman character at that point was sat on a couch glued to her phone. I remember kind of losing it on her. "Do you see this shit?! This is no time to be absorbed in your stupid phone. There's a whole life to live out here!". Anyway, my boyfriend and I ended up leaving her there and continued on.

As we were exiting the temple out the other side, I presume, there was a desert scene. We came upon some fellow adventure hikers that looked marine-ish. We were all geared up, heavy packs and the like. I don't remember being perturbed by the rough conditions -- I like for things to be difficult. Once in the desert thought I could see, way up on this impossible looking kind of hill in the distance, that there was this huge madagascar-like tree that I was under the impression we were heading towards. Its roots were visible to me somehow, through this narrow kind of hill it stood atop of.

While in the desert we came across the marine-ish characters camping in the distance. They said something like, "this is what it's about. Watching you kids become good at hiking.".

We continued on until we came upon a glacial river. The landscape obviously changed accordingly. At this point I recalled, as my boyfriend tried to show me how to navigate over this thin ice without breaking it, that I'd had this dream before. The last time, I broke the ice and he got mad at me. This time, I guess I succeeded: I got over the thin ice and delved into icy water, but was blown downstream by the current. He had to come after me and catch me with his hand. This is around where the dream ended.

This seems utterly fucking packed with significant symbolism. ?????? Ideas very welcomed.