<human>: Can you give me the gist of the text in a nutshell?

I have liked this girl for a few months now. Recently, for our final in one of our classes, we've been working on a project together building something. I (of course) am really excited, as I get to spend more time with her one on one. 

I think she is flirting with me when we work, and although it is a group project (6 people), she doesn't seem too annoyed that we're the only two working. She seems pretty happy around me, but outside the class we don't have much interaction. We have good conversations in class, but I don't know if she is just being friendly or has any feelings for me at all. I have seen her act this way with other guys before, but I don't know if she is just a really flirtatious/outgoing person, or if she had interest in them. 

She put her number in my phone a while back (when she was in a relationship), so I have that and I have her on Snapchat, but I don't know where to go next. Should I wait for her to make a move and play it safe? What could I do to see if she is interested and/or get talking to her more outside class?
<bot>: I like this girl and she acts like she likes me, but I don't know for sure as I've seen her act this way with other guys before and I don't know what to do next.