Love/Life Advice

Okay so lately I've been thinking about getting into a relationship but I have one problem. I tend to push people away who are trying be with me and this is a really bad habit. I think it's because one of my past relationships I was really treated bad and I've only been in one relationship (we broke up because of distance if that matters) since my bad relationship. I really tried to put my all into being with someone but no matter what I always end up pushing them away and then regretting it when I realize that they were actually trying to be with me. Does anybody know any ways or things that will help me get over this please, it would really mean a lot to me