Thinking about this some more.

Separation is a good way to combat obsessions with T.
When I'm with T, I want this, I want that, and it becomes obsessive.
When I'm without T, I just want my T back, and I'm prepared to give up the specific desires.

So absences improve my relationship with T, but to work on my other problems I need her present.

CONCLUSION:

Whenever T seems to be my biggest problem, a break might be a very good idea. When T is not my biggest problem, I should carry on.