I'd give you the same advice I usually give people in this situation:
Keep separate residences, and ask him to "court" you for a period of time -- say 6 months. You guys can either agree to date exclusively or not exclusively, but don't allow him back into your home -- nor your heart (especially your DAUGHTER'S day-to-day life!) . . . too easily.
Make him WORK FOR YOU. Slow and steady as she goes . . .