I’m (28F) thinking of leaving bf (34M) of 2 years over his insecurities.

We’ve been together over 2 years. He’s been the best BF anyone could ask for. Definitely my best relationship ever. He’s put on some weight since we first me (I honestly don’t care). Issue is, we’re on vacation right now in a much warmer place than home. Weather is great, pools are open, etc. Issue is, he won’t take his shirt off because of the weight he gained. Because of this he won’t go in the water. Am I expected to enjoy the pools/beaches alone now? Is this what my future holds? We were talking of moving in together but now I’m kind of feeling the “ick” people seem to talk about.