Post-Home, I think that's when he was really hurt and didn't know what to do. I think the writing did drag things out and could have handled it better, but he was trying to do the right thing by her and when he chose to leave Enterprise, the right thing by himself. With the bond and even just being close to T'Pol, he must have sensed, at least subconsciously, her devastation after The Vulcan Arc.
The complete shut-out in "Daedalus" was neither right nor logical IMHO.
It's logical if you've realized you've broken a man's heart, and his offer to help is based in a desire for a relationship you cannot give him. But I tend to have a compassionate view of both characters.