I am fed up with my husband and jail and drinking, he has no idea that I've left him he has 2 years to go, should I tell my husband that it's over or keep pretending to keep in good frame of mind?

This happens more that people know. If it were me, I'd want to know so that in the two years I would be prepared for a life without you. If he cannot stay in your home, he needs to have a plan for where he will go when he's released. If you spring it on him when he's released and he is counting on living there it is going to be a mess. The stress would be overwhelming for him - let him know now.