Being in a committed relationship where my partner is always around if I'm out helps. If she learns to recognize her mania symptoms early on, she can work at controlling her behavior or work with a PDOC on a med adjustment. I told my doctor about my emotional affair and he said "that's not so bad" and I replied, I don't want to cheat on my husband! I was really concerned. For the most part, as long as you both have good communication surrounding her moods and feelings, and just overall a quality relationship, I believe strongly that your girlfriend can remain faithful in the future. Just encourage her to continue seeing her doctor. I've been in my current relationship for 13 years and have remained faithful physically and except for 3 phone calls, emotionally. Good luck to you both. A good relationship can be very rewarding and I wish you the best.