I’m sorry but looking from the outside he doesn’t look like your friend. Also It’s always good to keep you on the bench in case it doesn’t work with his new babe. There is no friendship in your heart, there is love, the only way you can keep a real friendship with him is getting way and rebuilding your relationship as friends later, when you are both over it. So step way now for your own sake, you don’t have to fight but don’t fall for the friends thing now