HELP

OK, so its been a minute since I've had a chance to write a blog. I wont say that I'm back but this has been nagging at me so I needed to get this off my chest. I met this guy and we're cool. I mean we just friends, getting to know each other and chillin with each other. I've been spending a lot of time with him, staying at his house and what not. We're in similar situations but besides that we have some things in common. He is very easy to talk to, he makes me laugh, etc. Now here comes the dilemma. I know a lot about him because he's not afraid to tell me things about him. When it comes to me, there are somethings that I want to say and get out but dont know how and Im scared. He says that its like a gap because he wants me to talk to him about whatever is on my mind. My problem is that I really want to open up and talk to him about shit, I mean I told him about my past me growin up and shit like that. But when it comes to expressin my feelings I cant do it, it gets so hard for me. This has been something that I've hated about myself for awhile because I cant express the way I want to and it aggravates the hell out of me. I've tried for so long to open up but it seems like the shit I've been through wont let me. Hell the last time I opened up to someone was to my ex-husband and look where that has got me. Alone, trying to find my way again, starting over, doubting and wondering about every man. Now, I know that as long as I can't express myself that it will be a problem in any relationship that I might have in the future. I want to get rid of this fear,phobia, problem or whatever it might be. But I dont know where to start, how do you begin? How do I get over this problem?