My gf has been battling depression for quite a few years. But the past few months have been a lot worse. She is not on any medication or therapy as of now.

We were fairly active before. But she has completely lost interest now. I've tried my best to be supportive.

But my mind is wandering now. I'm horny and I keep thinking about getting laid with someone else. I would never cheat on her so I am at a loss now. Any advice would be appreciated.