The sexuality of Agender people?

This is something I've been wanting to ask for some time, but unfortunately, google can't answer everything.

So, theoretically, if I'm agender, and I only like girls, what is my sexuality?

Lesbian? But how does that work? Is Lesbian not supposed to be girls being attracted to girls??

Lesbian
/ˈlɛzbɪən/
 : a woman who is sexually or romantically attracted to other women.

And this can be used on the opposite gender as well! If I'm agender and I only like boys, what is my sexuality?

It can't be gay, for mostly the same reason as lesbian!

Gay
/ɡeɪ/
: (of people, especially men) sexually attracted to people of the same sex

Though the word is pointed more towards men, the meaning of Gay is to be attracted to the same gender, but Agender people don't have a gender, so how does that work??

When agender people say their sexuality, do they just say something along the lines of, "Hi, I'm ***, and I only like boys."?

Well, that kind of makes sense, but I'm curious if there's a word for it. If there is, please do inform me in the comments!

And if there isn't, why??