I'm sorry pretty blonde but it does look like he is back in full addiction...with the gloves and sudafed, I'm thinking meth? Was that the drug he was addicted to? The unkept home, missing work, ignoring his responsibilities, the cold sweats etc. you know in your heart what's happening and you don't want this chaotic, unstable life..trust me.
You deserve much better, ok? I know it hurts but run now ! Him ignoring you is probably the best thing for you.
As far as him cheating? People do all kinds of immoral things while in active addiction..I wouldn't put that past him. The weight loss? It sounds like meth.
I know you want closure, but that won't really change much, you know?
Again, I'm sorry but look at it as a learning experience and you'll know the signs next time, you can quickly move on... Good luck.