I have been feeling the same way lately. Just seem to get very angry and want to just quit. Then, I think of my boys and know I can't. I'm not going to be the one to give up.
Then something happens that really lifts me up again and I get enough energy to plow through the rough times again.
Make sure your PMA is skyhigh when going on a date, makes you feel (and look) very strong and confident. Show her that you two know how to have a good time, then she'll miss that when she goes back to her place.