Thanks again for the replies, I appreciate the wisdom and recommendations.
As I say, I am really struggling with reading and concentrating right now, I have a few books that have been recommended here that are half read, a few pages read or still untouched.
A friend of mine has been seeing a somatic therapist and highly recommended her so I think I'll try to book an appointment with her and see how that goes.
I think you're dissociating and unable to focus because you have so much repressed pain.
I think this is what's happening, I don't really know what to do with all of the feelings I have right now so I try to just lock them away.
My bet is that his infidelity stems from his avoidance and his reaction when he can't avoid.
I agree with this and have said as much to him. When he admitted his relapse and we discussed how to go forward, him getting IC was a non-negotiable term for him staying at my house. I did however say I would give him some time to settle into NA and get used to the other changes he'd made first, like cutting contact with life long friends, quitting his job, etc. But I think maybe now is the time to bring that all up again.
I got myself a little worked up because I thought he's not doing everything he should be and trying to avoid it but I think he is just taking his time so he doesn't get overwhelmed which is understandable but I'm just too alert to every tiny thing and see everything as a red flag I think.
For example, at NA, he'd not yet chosen a sponsor to start working on the steps with, so he's been going to meetings and sharing and listening, but I didn't realise you need a sponsor to meet/speak one on one with weekly to work through the actual steps of recovery. I really thought he was just trying to avoid doing that because he didn't want to start working on the steps and then I spiralled thinking he's not taking it seriously, it's going to happen again, I can't handle it again, and so on.
He came back from a meeting yesterday telling me has a sponsor. Obviously it's an important decision to choose your sponsor and he was just taking his time to observe and get to know people a little better to see who he thought would be best suited for him and who he would feel most comfortable discussing these things with.
I hadn't discussed any of my feelings about this with him, because I just don't like discussing my feelings lately, but I definitely worked myself up over nothing there, but for obvious reasons. I'm just a bit muddled. Hopefully IC will help me get my head screwed back on. I feel like I can't see anything for what it is, like everything is a warning/danger sign and I'm always on my toes. Even if I had discussed my concerns about him not getting a sponsor yet before I spiralled and he had explained to me why he was waiting, I think a big part of me might have assumed he was lying/making excuses.