A little corny, perhaps, but how about finding yourself a nice book with a title that mentions something (in bold lettering)about learning to heal your pain or something like that. Yes, it is a prop but so what. Leave lying around and be sure to read it when she is around, but not too obviously. Drastic times call for drastic measures. Ask Dottie if leaving Michele's books lying around where they just *might* be discovered would be a good way to let her know that you do care very much about this and are working on it.
She can't stand to hear about your physical problems because she doesn't like for you to be in pain which means that she DOES care for you very much even though she is screwing around on you. That means that you have one MORE advantage over little Mr.Adulterer in addition to the fact that she lives with YOU, and she has a history with YOU, she calls YOU in the morning from whereabouts unknown, yet probably guessable and how the heck must that make the ol' OM feel. Ha! She is playing games with you and you have got to find ways to block her moves in a positive way that will be to the benefit of you both and she must be able to readily see this. GAL,PMA,ETC...
I wonder, do you have a friend that you talk to on the phone at just the right time when she might over hear bits of the conversation about how you are hurting but respect her feelings, or something like that?
Keep at it- the positives are still there although they are probably obscure for you at times.
Oh, & to the last question: how about a smile (no smirking!) and "I'll see you in the morning then"... and go back to your book, tv, whatever activity you were doing.
Good Luck .
S