I'm sorry to hear how unaccepting your wife is; during what is already a tumultous period of time, she should be the one supporting you and helping you along. Going along to the therapist and relaying back to her everything you've talked about may make her begin to think about you, your needs and your feelings.
Oh, and if you can, I would definitely look to reduce the amount of alcohol you've been having recently. Like you said, you seem to be relying on it to make you feel better or to forget your troubles but alcohol is a depressant and will end up making you feel worse. I used to be the same, getting drunk nearly every day and waking up feeling awful, but i'd still keep up the vicious cycle. I eventually got my act together and - whilst I still enjoy going out and having fun - i'm much more restrained and never get blitzed like I used to do.
Also, waking up and realising you've spent £50-60 with no memory of anything and having a raging hangover
really sucks!
You seem to have had your epiphany so the tough part now is putting it into practice

All the best and keep us updated!
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