Should I break up with him?

Me and my boyfriend have been together for 3 years. we have had great times together, he is a good guy would never cheat and has a great heart. ALthough, he is 22 still does not have his GED or diploma, has lost all his previous jobs and currently works at fridays, and still lives with mom with no car. I have tried very hard to get him to get his GED, have even broken up with him but then went back to him before he got it. i love him more than anything, and he loves me. but lately he hasn’t given me as MUCH attention as he used (he still pays me attention, but it just isnt quite the same) He went over his brothers and brought a bag with all of his things, when he came back i went through his bag (in the past he has hidden quite a few things from me that i have found) which he hates, but i found two klonapins in there and i asked him about it he says he has NO IDEA how they got in there. i called his brother (he is known to do pills) and asked if he put them in there and he said no. clearly someone is lying. so my boyfriend was talking to his brother and said i being out of control and that he is trying to put me “in check.” Then i tried talking to him about the pills and he refused to talk to me. he would not even look at me. i was crying and begging for him to talk to me. he just kept ignoring me! so i finally left since he wouldnt talk, and he hasnt tried to talk to me since.