The other night he had a glass of wine with me. He said that it was ok for him to do this every now and then....
If he's an alcoholic it it NOT ok to do that every now and then.
I think he's started up again and it's my fault
How many times have we all heard this. It is not your fault, you are new so you are not familiar with the "Three C's" you didn't cause it, you can't control it and you can't cure it.
Good luck. Find a Al-Anon group. They can help you through this.