Wondering what is so wrong with me?

So to start out I know my main issue is that I've never been able to connect with people in general. I've failed at every type of relationship there is: friendships, romantic, and familial. Most friends just end up forgetting me. Every romantic relationship I've had has ended up in me being cheated, lied to, used, and betrayed. I feel the only reason my family keeps contact with me is because I'm family, I don't feel connected or truly cared for by anybody them. I know I'm partially to blame as I've often been called "dead inside" for never showing any emotion. I think though why should I, the only things I ever feel are sadness and anger. I bottle them up mostly and usually let them out in the worst ways, usually by saying something I regret. I just wonder if I'm truly that terrible of a person that no-one can love me. That no-one can want to stay in my life. I wonder if there is any reason to even try to have relationships with people because I'm not sure how much more of this I can withstand.