Help in my situationship

So I’ve been with a guy for around 8 months casually but exclusively at the same time. Titles sort of scare me because of past relationships etc. however we dated for around 2 months before I ended it because I was going through a lot personally and felt like a burden to him. I know a lot of this is from my past and being hurt before but I really like him and want to be together, but I always seem to push him away and now it’s to the point that he is still around but doesn’t believe I can be in a relationship. He’s always been sort of distant because it’s now a long distance situation because of college. If anyone has any advice on how to let go of my insecurities and to express myself better it would be much appreciated.