If you care for her at all you will quit. There is a chance she hasn't caught it and if so, you don't want to give it to her. When my hubby caught mono I never did catch it.
You should have your own knife, fork, spoon, bowl, plate, glass, etc. Don't share them with anyone! Don't eat in a restaurant where they have to wash dishes, as that can pass mono onto someone else if they aren't washed properly.
Change your toothbrush once a week and try to keep from giving yourself the virus again.
Take it easy or you can be sicker for a whole lot longer for then 4-6 months. My husband had mono for over a year.