Why does it hurt so bad :/?

Okay well me and my boy friend been goin out for a year and almost a month but he's going to a Technical Institute and ima still be in high and to be honest i really dont know what that is (Technical Institute) and well i decided to brake up with him last night cause i was kind of in a way being pressured to but also felt like it was the right thing to do and i broke with him cause well i don't wanna hold him back from life and well we barely talked at all and i completely understand that if he's busy and such but in a realationship its a 2 person job and i kept tryin to make things work but it seems like he wouldnt do anything and when i would ask him "whats up" or "how was your day anything new?" he would so "ooh nothing" but he'll go post on facebook and tell everybody but not me and now he saying that he wants me back and he'll try better to make it work and he does but only for like a day or just for the night but idk i gave him soo many chances its like ive been waiting for it to happen but it never happens and i love him but i hate the fact how i barely know anything about him and we've been going out for a year and im kinda just woundering was it the right thing to do?