Insecurity

Keyshara • I'm happily in a relationship
Whenever my boyfriend and I have sex I always leave my shirt on because I hate showing my flabby arms and muffin top. He gets mad at me whenever I do. I think I'm fat and it's frustrating because he acts like he doesn't understand my insecurity. I need help 😣 What's the best way to get over this? I'm motivating myself to start exercising.