Should i break up with my boyfriend?

ok guys i really need relationship tips here. my boyfriend constantly disappoints and hurts me. Last night we fought again. Yesterday was the day when the result of my master degree finals revealed and the minute i found out i passed and got a merit, i was chuffed to bits, and i texted him straight away expressing how happy i was and i deserved a reward. He said ok. However, he went off to a pub right after at work and came home in the middle of the night. I was furious cos i constantly feel like he doesn't really care. and he didn't even say his sorry. we have fought over things like this loads of time. i really can't take it no more. we've been together for 3 years. i really love him but all he does is break my heart. I don't know if this relationship is worth keeping. He never buys me flowers and give me surprises, but i am always a romantic person. sometimes i don't feel like he knows me at all. ive told him what i really hate about him but he never makes a change. Folks, please help, should i leave him or am i the one who's being overreacting? i have a bad temper i admit. but he doesn't really help calm me down however says things to provoke me to beat him up sometimes i do hit him. i know this is bad but i just can't help it, its his fault and he just never admits he's done something wrong and apologises! i am 23, he's 21. or should i start dating guys older than me that we might get along better?