Disappointment in online dating

I know many of you met your SO online so I need your advice. I've been online dating for months with no results. When I meet a guy I always feel disappointed or uneasy because I find it hard to feel comfortable with strangers. Unfortunately I live in a small town and at 36 I'm having a tough time finding single guys IRL. About a week ago I started chatting online with a guy and for the first time ever the conversation felt incredibly comfortable and easy. We share interests and the same sense of humor. I know it was stupid of me but I couldn't help getting my hopes up. He suggested meeting and I accepted but I told him I was nervous. He thought he was doing me a favor by calling me to try to put me at ease. I don't know why but I felt so disappointed afterwards that I wanted to cry. Maybe it was his voice, maybe the fact that he tried to be funny but it felt forced. I feel so bad because he was so kind to call to reassure me but now all my enthusiasm is gone. I'm still going to meet with him but I think I'm done with online dating. I'm so tired of being alone but I'd rather stay single than go through another disappointment. I was wondering if you ever felt disappointed by a guy at first but then when you got to know him better you changed your mind and things actually worked out.