My bf gave me body dysphoria

Pls read the edit down below!

Way back he commented on his friends boobs to me, how good they were.

Then I noticed he kept staring at his ex's cleavage when I was there. On multiple occasions.

I'm a B-C cup and I feel awful. He only has called my boobs nice once and that was after all things beforementioned, so probably out of quilt. I feel like he's settling for me.

Now I find my mind compulsively wandering to breast fat transfer surgeries and trying to gain weight to make my boobs bigger.

I was bullied in school for being "flat" and "a plank". I had worked on the insecurity for years and this all brought me back to ground level. And I hate to admit it but I kinda resent him for that.

I never thought my bf would give me body dysmorphia but here it is. Idk what to do.

Edit: We had a talk inspired by you guys's comments. I told him how I felt and how my body image has changed bc of these instances. He says my tits are good. He says if I feel bitter he understands and wants to help me work through it if possible. He apologized for triggering this in me and causing me to not feel good in my body and loves my body just as it is. He said he doesn't understand the staring part bc he doesn't think he's done it or doesn't remember. Further explains he might've been just staring at her belly bc she has been gaining a lot of weight (objectively true, rude still but different kind of rude) Highlights he doesn't see her attractive at all. I tell him respect is even when I'm not around.