It is understandable that you have difficulty to trust your H after what you went through. To build the trust, your H needs to be more open about what he does and where he was without being asked. If he does that, your trust will come back. This is the advice in the book "Not just friends" by Dr Shirley Glass.
My W has also slept in the guest room for may be 3 months now. I felt more distant to her. Like a roommate instead of spouse. If she does not change, we will part soon or later.
Hope staying together in a motel help you both feel closer. I am going to business trip for a week next week. Leave my W alone. Haven't talked to her yet. The first session with S's C I have to brief her about the situation. Hopefully S will be OK.