Hi guys, fairly amateur pua here.
So I'm in a summer work program with people who are also working for the summer. We got our little clique going on with a mixed set. I was thinking what better time to practice some pua skills than now since I'll probably not see these people again when the summer is over.
We had a little party couple of days ago and I think I hit it off pretty good with a girl, I made a lot of social kino(no where inappropriate though). But when we both sobered up, I don't see any IOIs.
I'm starting to think she likes another guy in our group, she keeps talking to him. Today, that guy and my friend drove to work so we split into two groups to drive home (we all lived in the same apartment complex). A girl that my friend likes actually split away from the girl I liked just to get a ride from my friend. My target on the other hand left with the guy she kept talking to. Whether it was a shit test or not, I didn't want to seem clingly so I decided to ride with my friend.
What should I do?

Everyday that passes will only make it so that she feels more comfortable as a friend.