I don't usually comment to these posts because I'm not sure if I have the skills to be of any help. However, I think I see some similarity between your partner and myself and I thought I'd share my feelings on the subject.
Roger said it already, and I would agree, that your partner has to be willing to do this for himself - he shouldn't be pressured into something if he's not ready or willing. At the present time, I'm in a similar situation. My GF and I have spoken. I know she really wants me to go to a T and I know I need to go to a T, but I've not been able to muster up the courage to actually go. The thought of trusting someone and talking face-to-face about my abuse is something that fills me with indescribable amounts of fear and doubt.
At the same time, I realize that I am in a relationship and my actions, or inactions, also affect my GF. I think that if he doesn't already know this, you need to make your partner aware of this fact. If my GF reached a point in her frustration that she was questioning the future of our relationship, I would hope that she would be able to talk to me about it. As much as I want our relationship to work throughout my recovery, I realize that in the end she must also do what's right for her - and that might mean leaving me behind. I would hate this, and the thought scares the hell out of me, but it's up to her to decide how much she can take. I would never blame her for that and, really, when all is said and done, I just want her to be happy.
So, what to do with your thoughts about your relationship deteriorating if he doesn't address this? My answer is simple; share them with him. If he doesn't think he's able to do what's best for himself, then I would say he should know you need to do whatever you think is best for you.
I'm sorry if that's not the answer you were looking for. I hope and pray that the two of you can work through this.