It seems to me that your boyfriend is on a downhill trajectory and my fear is that you are going to be pulled down too if you stay with him. I understand that you love him and want to help him but it does not seem like he's willing to help himself. It's not as if he's telling you that he's seeking counseling or going into rehab. You need to do what is best for yourself and that seems you might want to walk away from this situation and find yourself in a happier and healthier state. You deserve more than what this situation offers you and it looks like things will likely go from bad to worse. As for telling his mother, if you think she can help him get help then maybe it's a good idea. But not if it's going to put you in an even more complicated situation...