Former drug/alcohol abuser boyfriend Ignoring me to... drink?

My boyfriend and I have been together three years. Before our relationship we were best friends. At the time he was abusing xanax and drinking excessively, and he ended up getting a DWI. At the time, he was only 19. Years went by before he was sent to court and properly charged. When he was 21 we got together. He got sober before we got together and so did I. We both agreed we wanted to straighten our lives out. We got together and everything was great, it was about 6 months into our relationship that he finally went to court and got charged with the DWI. ( I ended up finding out 6 months ago that the first 6 months of our relationship he wasn't even sober he was just hiding the drugs and drinking from me) He was sentenced to probation for two year, + other stuff but the probation is important. About a year later ( a year and a half in ) it happened for the first time. He went to hang out with an old friend from high school, and got drunk. I yell at him and threw a fit because he was on probation and I didn't want him to go to jail. He agreed, he was stupid. But this happened a few more times. It always happens the same way, he says he's going to his friends, and out of nowhere he stops texting me then at like 5am I get a phone call where he's drunk. This caused us to break up several times. Well, my thing is now he's off probation, and I still don't want him to drink. Am I wrong for that? He is 24, he should be able to drink with his friends. But he doesn't just drink a few beers, he drinks like a case. The other night he went out and drank whiskey for the first time since we got together and I'm freaking out because he used to down half a bottle of Jack Daniels a night. He admits that he had a drinking problem. I'm just scared he's going to end up there again. And he always ignores me while it's going on. I don't text him or call him to bother him or any of that! He literally just stops replying to simple texts, and forgets about me until he's drunk and home. This is long and all over the place. I just don't know If I'm wasting my time in this whole relationship or if I'm over reacting. He even lies about how much he drinks? Idk. I just don't want him to end up how he used to be. He wants to start a family and everything, and I just don't want to be stuck. Please somebody help me.