I 19F have a friend 22M who is overweight and has asked me out I’m in a tough spot

I (19F) have a friend (22M) who has told me they cared for me in a different way than just friends. I always felt like helping this person and I liked helping them with little things. We see each other and hang out everyday for basically the entire day. I really enjoyed the time we spend together and I really did feel happy, but it’s it bad that when they asked to go out I was only thinking about the fact that he was over weight. I am by no means a person who dislikes people who are over weight but for some reason I’m afraid because this person is over weight. Do I really even like them if I can’t look past the fact that they are a little over weight. I mean you can loose weight, but it’s just bothering me. Maybe I’m overthinking it the only reason why I’m thinking like this is because I would never want to hurt this person. I care about them a lot to the point that if I got into a relationship and something happened they caused me to want to leave I would stay just because I care about them so much that I would not want to leave and cause them pain. I also am afraid of my moms approval because she is a very hypercritical person and will judge anyone I like just because she thinks they aren’t attractive or they are not making enough money, very materialistic things.
Do I really like him is what I am trying to figure out and I’d love some third person person perspective.