What are some ways I could do to figure out if she likes me? I am not going to straight up ask her because she?

I think that she might like you a little, but it's always a little awkward. Invite your friend over and his sister, and a couple of your other friends (to make it seem less obvious) and get to know her without it seeming like a date. Once you get to know her, tell your friend that you sort of like her. He could be like your wingman, and he could tell her col things about you. Also, if she's applying at medical school, especially if it's long distance,start texting her often(if you are you know, an item) and set up a video chat. If so, you could have a great relationship.