how to cope with s/o liking girls pics?

i’ve been told by many people i’m conveniently attractive but i have severe body dysmorphia to the point i’ve almost taken my life over how i look. i often go through depressive episodes where i just hate myself. i’ve seen my boyfriend like this girls swimsuit posts and i’m going crazy i feel sick. she’s way better looking than me and i feel 100x worse about myself. he always compliments me and tells me i’m beautiful but it seems to me i just don’t meet his standards. has anyone else gone through this? it feels horrible :,) how can i cope