I Have Major Depression. Can My Depression Cloud Your Decision

I have major depression. Can my depression cloud your decision making? Ive been caught out beem unfaithful with my partner of 5 years. I love my partner. She isn't a very communicator. I started grooming women on dating sites, meeting up with them, then having sex with some.
My partner and I havent been intimate since January. Because I had an affair prior. She allowed me to stay and work on our friendship. Which I happy to do. But since March thats when I started trolling the net. I was living two lives. I was caught out. Im happy that i was because I believe it was becoming a habit.
I want to be with my partner. I believe my decision for look for intimacy is all I wanted and I wasn't getting that from my partner. Ive had depression for 12 years. I take 120mg of Cymbalta for my depression.