I really like this girl, but she goes to another school, and I only get to see her every so often. She is best friends with one of my close friends, and we hang out about once a month with a group. Last time we were together, she seemed interested in me, but I haven't seen her in about a month. I really want to ask her out the next time I see her, but am worried any spark we had may not be the same as it was last time. What should I do/expect next time I see her?