Why is it better for him to move out if its PA? I just don't see any other way to improve myself while catering to his needs as well. I want to, of course but want to fully not just part time.
Well you have to do what you feel is best for you, if I understand you correctly then you're saying that even if he's not in a PA that you want him gone so you can work on yourself? And if you feel strongly about that then it may be the logical next step.
It's difficult to reconcile if one spouse is actively engaged in a PA. An EA is tough too, but a PA establishes intimate physical contact and bonds that are much more difficult to break. Reconciliation is always possible, but usually the affair has to be broken off first. Then the PA spouse has to go through a grieving process of losing that person, and often during that process they will try to go back to them.