Hello, and welcome to the forums!
Lucy101 wrote:I should mention that he has a history of childhood trauma, anxiety and depression. He also smokes marijuna and drinks alot.
Anxiety. Depression. Booze. That's three erection-killers right there. Not to mention depression and lack of want-to.
What I don't understand is sleeping separately- unless he's feeling as if he'll be pressured into sex.
Off the top of my head as a depressed and anxious male, he could be unable to perform and wanting to avoid that from coming up- well, not coming up I suppose.. and the anxiety/depression could simply be taking the desire away, quite independent of ability.
You might have to pressure him to get into some therapy or something. I mean, couples slow down- sometimes a lot (I know!) but this seems to be flagging before it's even properly started. He might need a little ultimatum that y'all get this worked out (with professional help if necessary) or you are a roommate. That seems pretty dire but if he walls up then something has to chip through it, yes?