Why do I remember my past life if ghosts exist?

I'm a young woman who questions a lot in life. A couple of years ago I started to get this weird feeling as if i wasn't meant to be here. It's hard to describe what i mean by that. It's as if I'm living in a dream 24/7. Not too long after this feeling started I got these weird dreams that felt so real that i woke up with the last feeling i had in my dream. In my dreams I'm a young Asian man (teens to early 20's) and most of the time I'm at some sort of red bridge, but occasionally I'm in a forest. My most recent dream was the forest one. I remember strolling through the forest with a feeling of overwhelming sadness. In this particular dream i get attacked by three men, i think they were wearing black and they had a face cover on the bottom half of their faces. I distinctly remember the feeling of being slashed with some sort of knife of the back of my lower right arm, probably about half way between the elbow and wrist. After that i get attacked more and then my vision goes black and the dream ends. I woke up the day with pain in the same area that was cut in my dream. After this dream I started to remember things, memories that weren't mine... One dream consisted of me as the Asian man hanging out with another Asian man around my age, i don't want to say that we were lovers but it felt that way. I also remember what he looked like, as well as what i looked like. I don't really remember my name or his name, but i have a strong feeling towards a name Junseo, it makes me think that this was at least an alias of my if not my real name. I also feel great anger about the events pertaining my death. I have hopes of reuniting with my lover, even if I'm not longer me. This is the only memory i have of him. I drew myself so that i could remember. That being said i also lived in a trailer as a kid, it was definitely haunted. I would hear footsteps when nobody else was home and i would hear voices talk to me at night while i was in bed. There was a man who would watch me sleep, and the one day he wasn't there a four legged creature jumped at me from the corner of my room. I refused to sleep in my room from that day on and the voices stopped whispering to me at night and i never saw the four legged creature again. If i remember my past life then why are ghosts real? Are ghosts simply people who never got reincarnated or is it deeper than that? I am not a religious person, so i'm simply trying to come up with a logical reason. Is my mind simply playing tricks on me and or am i just insane?