Do I end it once and for all?

Hello all, ok so long story short, me (23) and my boyfriend (24) have been dating on and off for 7 years since we were teens. We’ve broken up millions of times, gotten back together, cheated on each other especially during the last 3 years. We can’t seem to let each other go… the love is there, the attraction is there, but ZERO trust, even though we’re trying so hard to. Suspicions are at an all time high, since we both claim to not be cheating.. (I have’nt in over a year) Ok so here’s the thing: recently he’s started hanging late with these friends daily, drinking, and smoking weed (which he’s never done before these last few months, and always was against me doing it) and I find it such a turn off. But is it b/c I want to be more serious and for him to mature and offer me more? or could i possibly want more time from him, which is hard anyway b/c I work and study full time. I constantly feel like breaking up to protect my feelings, and other times I want him and I to get a place and take care of each other (which we tried and failed beforefor about 2 years). Other times I feel like cheating! WHAT’S WRONG WITH ME? I feel confused, yet I know what I would want from him once he gets it together. most pple tell me I’m too young to settle down and to just have fun. But thats not me… unless I feel HE’s forking me over. Does anyone have any concrete advice? This is torture.