Sometimes I feel like my boyfriend isn't attracted to me?

Hey... So, when we first met, I was overweight. I sent him a picture of my tummy and he said I looked beautiful and that he would love me regardless of what I looked like, but I didn't believe him. Since then, I've been on a strict diet and exercise schedule, and I lost tons of weight, but I'm still insecure with my body. Sometimes he brings up the fact that I used to be "fat" or "chubby", or that I am still "chubby" and it really hurts my feelings, but I always keep my mouth shut. I'm afraid to even do things with him in the future because I am so secure with my body. Help please?
Sometimes I feel like my boyfriend isn't attracted to me?
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