Perfect boyfriend but I keep pushing him away..help?

I don't know what to do, how to explain my resentment towards my boyfriend..I tried explaining it and it just doesn't make sense when I say it but I feel these things.

I've been with guys before, and on a few occasions we never got past the first stage of the relationship - the lovey dovey part, except for one guy, who I was really into.I know my feelings for him were more intense than my boyfriend now, despite my ex's lack of ambition, lack of compassion, clingy and introverted nature.

My current boyfriend is the exact opposite to my ex. He does anyyyything for me, loves me so much, so extroverted and fun. So why is it I have a problem with him?

I can't pinpoint why this is happening..

I know for certain that I don't have intense love for him as he has for me, because I am his first girlfriend but he isn't my first love. He has immature antics that embarrasses me sometimes, as i am insecure about how people view me - and being with him does not produce the best image for me. (In my head, its like the delinquent class clown with the valedictorian sort of thing...as shallow as it sounds,it affects me.)

He's also lazy in school...in general he's not as serious as me. but I feel as if he balances me out rather than clashing with me.

but I get so annoyed at his antics, I even get angry sometimes, and the guilt eats at me knowing that I don't love him as much as he loves me, that he does all these things for me but they don't mean as much as they should..

and he talks about the future, he wants this long term...at first I did too..but now..I just don't know. is it that I can't handle the commitment? How do I overcome his faults? Why don't I love him like how he loves me? Is it that he's better at being a good friend than a boyfriend? I can't break his heart..the guilt will eat me alive. =(

Can anyone help me? I asked him to give me some space to get myself sorted out for now.I want this to work out with him, but I really don't know what to do.