It’s perfectly reasonable for him to lose attraction after a lot of weight gain. That’s life.

He stuck with you while you were hurt right? While you’re recovering in a wheelchair and going through PT, he was by your side? Was he helpful and supportive during that time?

The fact he says he would be worried about what his friends think is honestly weird as hell. It’s one thing to lose attraction, but it’s completely different to be ashamed of you and worry about the social consequences of having an overweight GF.