I've been with my boyfriend on and off for 3 years and I finally broke up with him cause I felt that I was hurting him because I felt that I was with him for the wrong reason which is because I was lonely but I miss him and want him but I need help deciding :( he is so wonderful and just great and I just want him to be happy even if we are not together.. he's happiness means so much to me

You figure yourself out because you still don't know if you want him for the right reason.
Leave him alone and work on you.