As an alcoholic with two decades of recovery, I can tell you getting sober is one of the most difficult things you can do. Right now he must put the focus on himself and I'm very glad he put his sobriety first. Even the best of relationships stir up a lot of feelings. It's time for you let him go. And for yourself you must let go and find a person who is capable of being in a relationship. Someone newly sober isn't.