I think im a chubby

I and my boyfriend have been dating for a little while now, and he always calls me his chubby and says it’s a term of endearment and I don’t know if I’m being too sensitive into it. I don’t mind being chubby but I’m a little self conscious about my body and appearance too. He says it’s okay and he likes chubby girls and he’s fine with me at my size. But I’m still feeling a bit sensitive about it but I don’t want to ruin the relationship I feel like I’m just looking for problems.