I don't think any decision you will make will be impulsive,as you've come this far and thought of everything already. I also don't want to sway you into any decision either, but I can't understand these relationships with others online. I do believe things can be worked on, with marriage counseling or doc and T's. I had a boss who once said"love is like the wind, it comes and goes." Don't hurt yourself please, even if you leave your wife there are plenty of fish in the sea, and you could discover new and different feelings with another. You may even enjoy being single. Maybe if you're on meds they could be raised in dosage for the depression?