<human>: Can you provide a brief rundown of the text in within 3 sentences?

23/M here.  No dating experience.  

I'm in college, and met this girl last year.  We're not super close friends, and never see each other outside of class.  We're in the same major, so we ended up in a class together again this semester.  A few days ago after class we ended up talking for about 20 minutes, and she laughed really hard at my super bad jokes.  Assuming this was a good thing, I texted her later that evening asking her out for coffee on Friday (tomorrow 9/23).  She said she was going to be busy during the time-frame I suggested, but prompted me with when she was going to be free.  I said that that time was fine with me, and assumed everything was going great.  

Cue today, and after class she tells me she's invited our mutual friend to come along as well.  This mutual friend says she might be busy during that time so it's up in the air if she's actually coming or not.  What just happened, and what would be the best course of action to tell her that I'm interested in her (which I thought was obvious), and not just wanting to hang out as friends?
<bot>: Invited non-close friend classmate to coffee because she seemed interested but she invites a mutual friend to come too.  Help!