Can anyone tell me why am I so cynical and can I can stop to get a relationship or start living happier?

Okay so I am probably the most cynical person you will ever meet, I have friends and some good ones at that and we all seem to share the same thing in common; we hate people and we have a view and argument on pretty much everything. I have experienced quite a lot of bad things, I was forced to have an abortion at 14 - this completely made me hate myself, I got raped by my best friend's dad and I live in a town that is full of scum and pervy men. I find it so difficult to build up new friendships unless the person lives in my cynical world and I really want it to stop. I don't know whether I am just a realist that sees things for what they are or I am just heavily cynical and maybe should live a little and stop thinking so much and analysing things, if this is the case how can I do it!? I also think i'll find it difficult to have a relationship with someone, some people think i'm bonkers - some love it but some don't understand me and i'm also quite insecure about things. Nothing seems to happen for me? Can anyone give me any ideas or tips on how to perhaps get a relationship or how to change my cynical views? Thanks!