Should I break up with him???????????????????????????

I love him. Ive known him for 3 years..and he's always been a lady man, and ive waited for him to realize my feelings. I never gave up hope. OF all the girls hes been with I always beleive one day, he'll know I love him, I cant find anything wrong with him. I know him. Ive known him for 3 years IVe slept in the same bed with him, changed it fornt of him, weve been through thick and thin together, and now...just as I hoped, were together! I dunno if this is just guys, but his twin sister is my best friend. and we like the exact same things, and he says all that she llikes is stupid, and me and her are just alike and he calls her stupid. we called him to ask him if he thought i was stupid, of course he said no but....does he do that just to annoy his sister? or does he really think im stupid??? another thing...he never texts me or talks to me and i never get to see him. and whenever i ask him if he wants to hang out he says no, but he says he loves me, and hes really sweet to me. I love him and all, and I dont wanna break up with him because I did NOT waste 3 years of my life on nothing. It could be that hes really nervouse and thats hwy he doesnt wanna hang but how can i change this? should i give up? should i keep trying? how can I be a better girlfriend? how can I show him how much i care for him? :( please help..