You are not in a competition w/others here. You are the person you have always been, strong, independent, safe and very much rational. The new friends he makes are those who do not know the history of him, his life or his marriage to you. Be yourself...do not change to please him. If you have changes that need to be made, do it for you, not him.
As for his new friends.....nothing says you have to like them or be part of that little clique. In fact, the less you deal w/that bunch, the better. If he wants to talk to you about them, you can opt to listen, but I can assure you, they are as immature and irresponsible as he is right now.
You are far, far better than any of that new crowd.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.