My Boyfriend (M29) told me (F25) that it’s hard for him to get over my body type. How can i get over this?

I’m unsure what to do. i’ve been feeling pretty heavy about this today especially: I went to the gym and felt really great but then when i pulled out my phone to take a mirror picture i was disgusted at what I saw. I cook my meals, cut on carbs and eat very healthy, my job is very physically active: i just have a little chub on me. i’m not fat by all means just slightly overweight even tho im healthy. but early in our relationship he said he was concerned about my weight and if he would stay attracted to me. and that’s put a huge number on me. Lately he hasn’t been wanted to have sex for a while but he’s showing a lot of affection. I just feel so gross. unsure what to do because i workout and eat healthy. I’ve told him what he said upset me a lot but he responded with “i don’t take back what i said, i meant it” He’s very sweet to me thought he just wants to keep it realistic. some advice or honesty would be great: and maybe some help. how do i go about this? i’ve already talked to him about it and i know his answer. So how can this be resolved? i’m out of ideas