when he saw you he went out of is comfert zone to not date big women so he could date you if you get were im coming at
He probably likes your personality but wishes you'd get bigger.
He probably has a preference for big women but it doesn't me he's not attracted to thin women as well. Men have a wide spectrum on what they consider as attractive.
I love big women to but I also like skinny women as well but I also like to have skinny women and Fatten them up to big women. I had this 105 pound girl and fattened her to 160 pounds.
If he dated you. I would respect a man like that. Dating you, probably shows he is not vain or worried of looks much. A guy like that is concerned more about being treated great and just wanting to be in love.