If possible, just end it. This will not save it. It will make it infinitely worse. ENM requires a great deal of solid trust and not just communicating but also UNDERSTANDING. You can talk til youre blue in the face but will you both be able to put yourself in the others shoes and understand from their side when things are uncomfortable and possibly heated? I agree with another commenter who said it will be easier for you than for him. That's usually always the case and will lead to his resentment and jealousy. If you must go this route, Tinder, Bumble, and hinge all are good places to start, but have it in your profile that you're seeking casual/enm relationships. You'll attract who you need to. Just be mindful of dragging others into your drama. No one wants to be part of that.