Trying to understand some relationships just don't work?

A few months ago I met a great, fun, and amazing guy. We both had a great time together. When it came down to dating, we both agreed it just wasn't right so we went our separate ways. We are both 24 so it was very straight forward and honest, no hard feelings. I am bummed about it though - I really liked him and I felt like it should have worked but it just felt forced. I am kind of trying to come to grips with the fact some people just don't work together and it's not a personal thing but it's hard. He came into my life at a time when I needed to break myself away from some things and he helped me do that. Does anyone have similar stories or encouraging words?