it's a good thing to be very supportive of your mate. my boyfriend has been with me through the worse of the worse. i understand his situation completely i've been through it myself, but it is so important to keep that kind of closeness and intimacy between you. when i really stressed it's hard for me to perform, but overall it's also hard for me to keep my hands off of him when he's around.
on the other hand i know his urges didnt go away 100%, so is he going cold turkey completely. please dont be upset with me when i say this, be careful that he isnt cheating on you with someone else. this is advice for you to protect your heart.
good luck