If you're only "a little concerned" about her multiple affairs, then there's not much we can do to help you. We cannot manufacture, for you, what ought to be your own healthy amount of self-protection and righteous indignation.
I know you don't want to lose her, but let's face it, you've lost her already. She's a serial adulterer, and with the intel you're armed with, the fact that you're doing nothing about it means that you're enabling her.
Time to take a stand, dude. I hope you'll listen to me this time.
