Johnnie, I can't remember: are you on any sort of anti-anxiety/anti-depressant meds? They REALLY help, and there's no shame in using them to help you deal with this difficult situation.
I would rather see you do that, and stay in your home, but if her continued infidelity is going to cause you emotional and even physical health problems, I would strongly consider telling her she needs to find someplace else to live within, say, 30 days, as Bill suggests.
