How is it you go from him telling you you are the best of the best! thier angel, etc.. to 3 yrs later being dumped by booze and drugs?

Thats the way I look at it anyways.
He is really bad. His mind is so far gone its scary. He promised to put a stop to the addictions but just couldnt and I couldnt deal with it any longer. He turns everything around on me and says I am the one with the problems. I seldom drink and I certaintly dont do drugs so how the hell am I the one with problems? the only problems i had was dealing with him. His family are also problems in all this because they feel pity for him and do whatever they can to clean up the mess and make him feel good again, saying he is a sick person. They couldnt find tough love in thier hearts. I can imagine the lies he has told them and I want to talk with them to clear things but that will just make things worse so I wont call. It just hurts so bad and I have done nothing wrong to him to deserve this. All I have done was to love him.
Not only am I dealing with my ex, I also have a son who is an addict as well and is in rehab. I can't believe I am dealing with 2 addicts so close to me and Its very hard. Most days are too hard to bear and I just cry. I am glad that my son is in rehab and I just hope he makes it this time. Its all up to him. He has really really messed up his life and I dont know how he is going to ever recoup. Its going to be a very long haul for him. I dont have the money to clean up his messes like my exes family, but maybe thats why my son is in rehab and my ex isn't.

Thanks for listening.