How to move on from boyfriend?

I just broke up with my boyfriend of 11 months which is the longest relationship I've ever been in. I did it mostly because I felt like he was overcrowding my space and I really just wanted to be independent. Also, one of my close friends just died and I realized that he wasn't there for me in the way that I've wanted him to be, and he doesn't have his life together. I feel SO bad though because we shared something really special but at the same time, I felt like I was beginning to hang on to something that wasn't really there anymore. He was a good guy but we both wanted different things. I'm scared if I made the wrong decision, but I know I shouldn't go back. I know that I was the one who did the dumping but I feel really bad about it! How do I get over this feeling? Thank you so much in advance, anything helps!