My Problem

So I have realized that I may have trust issues. I can't let people know what I truly think or feel, and I can't trust what people say is true. It's not like severe trust issues, and I still haven't figured out where my little fear comes from, but it's kinda affecting my life. Every time someone tells me they like me, I sort of think to myself, "Yeah right. Seriously? Why would anyone like me? They don't even really know me. And even if they do, it won't last." If I were to actually to tell someone this, they would either freak out on me, stand there awkwardly, or say I have issues. Well, at least that is most of the reactions. I'm working on it. I really am. I've started telling a couple of people how I actually feel, but I still have that little voice disagreeing with people. I'm not writing this for a pity party or anything. I just wanted to tell what I was thinking for once. Maybe it will help me improve?