LDR boyfriend’s Instagram account

I’m in a long distance relationship and I feel betrayed and shocked. My boyfriend recently joined Instagram and I noticed the amount of people he follows keeps growing exponentially. I was curious of who he follows and found a lot of sexy Instagram accounts. Women who may or may not be models, NSFW posing, borderline porn star. I feel like this is a deal breaker. I haven’t confronted him and I’m afraid to. I feel like obviously I’m not his type. I would never post sexy photos on Instagram. I don’t look like a model either.

This is the first guy I’ve ever been with. I feel like breaking up with him (especially over this), but don’t want to burn bridges. I tried breaking up with him several times before. I don’t think he got it.

Thoughts? Or am I the only one having these feelings and going through this?