Ballroom partners

I do ballroom just like my sis in school and i think its fun, but next semester we have to pick partners and i dont know who to pick and its stressing me out so much. I have a girl in mind but im not sure she is going to pick me, and if she doesn't pick me I'll have to pick someone else and I dont really have a back up. So I'm kind of stressed out. I still like all the girls that I dance with,but its just one girl that is really good and I'm not sure that she is going to pick me and I really want to dance with her.