Hi! Well, the first thing I'm wondering is if he has talked to his therapist about this issue. Is it possible he is feeling really pressured? I'm sure he can tell your frustation, since you like to have a very active sexual life.

Could the two of you go to talk to a therapist together? Maybe even a sex therapist, if there's one available? You might have to use the approach where you have sex without intercourse for awhile until he can get more relaxed. (Perhaps a dildo might have to do for you during this time.)

Alas, I am sure that his anxiety is increasing even more with this issue. But it sounds like things were generally fine earlier. Could moving in together be making him feel more pressured? Just a thought.

At any rate, those are my ideas. Hope all will improve before too long.