Feeling like i should break up with my boyfriend

So my boyfriend and I have been dating for a month and a half and sometimes I cant stand it and feel trapped and like Im going crazy. He has a lot of legal problems that he has told me about in the past (such as a warrant, DUI and court dates) which i didnt judge him for as he is dealing with it apparently. He used to be into pills and is now just smoking weed (its legal where i live) but still he is like constantly high, i brought this up to him that i dont like that hes always high around me and he says that I cant tell when hes high even though i can. He acts different. Not to mention he is extremely codependent and even if we already hung out the day before, he will want to hang out the next day too. He doesnt have any friends (he told me this) so im the main person he hangs out with. I get really annoyed by him. He can be embarrassing in public as well and start acting really loud/silly and loud noises trigger my anxiety. Idk what to do. He is a really nice person. But he also said if he didnt have me he would "blow his brains out" which makes me scared he will kill himself because hes attempted before. I just feel stuck😔

Edit-For people saying leave him, how would you go about it? Ive already met his family and I would feel like an asshole. Im trying to be happy with him but im just not.

Edit 2- He literally stopped by my house unannounced to give a snack to say sorry. And asked if he could spend the night. I have work in the morning so i said no cause when he spends the night were always up until like 3am and I have to work at 5.