From what I understand, OP is actually
demiloveual. Though for most people who are unfamiliar with loveuality terms, "uninterested in love" is easier to remember.
Like most loveualities, however, you really don't need to tell someone unless they ask, and only if you're really comfortable with asking them. Otherwise, you could just say you're straight and not interested in getting in bed. Any friends or acquaintances who call you names or make fun of you because of that probably aren't your friends.
It's a stupid thing to ridicule someone for, and it's reasonable to think that way imo. A lot of people value meaningful relationships.