Well, I do have a little concern about how he was drunk enough to not remember yet cognitive enough to plan, but to be fair, you know him better than I do, and I've never been remotely close to drunk (not legal for me yet, and honestly, I think most of it taste awful, with very, very few (though amusing) exceptions).

As far as trusting him, it will take time. Keep communication open between the two of you. Be honest. Let him know what he did hurt you, and that you are still concerned, and that it will take time to rebuild what was damaged. But let him know you are trying to rebuild with him. That takes work from the both of you.

Take care, and I hope things work out.