People rarely cheat because they find someone better, you only need to look at celebs who have cheated - Ashley Cole instantly comes to mind…..
remember, you never have to do anything you don’t want to do, or feel uncomfortable doing; and also sex should be fun, not giving you anxiety!
you should be able to communicate, ask each other what you both like, each others insecurities and each other fantasies.
When I got my implant, I lost size, I was massively insecure but because I couldn’t change what I had, I played to its advantages and took control. Because I did this, the size ( although not small ) is no longer an insecurity for me.
inhad an ex once who was overweight, I didn’t really mind because I loved her regardless, but she kept saying how she hated her body, how she wanted to change, but she never did anything about it and I found this waaaay more unattractive than her body itself.
I guess what i’m trying to say is only you can change how you feel and only you can change the way you look….