Need advice on a situation?

[Corey]

Ok so about 2 months ago i met a girl who i now like. We text/talk on facebook all the time and she seems to show some interest in me (laughing at bad jokes, always making eye contact and smiling, etc.) however, last night i was going to meet some friends and i saw her walking around with another one of my friends. She stopped and said hi and acted exited to see me, but continued with him after the three of us talked for a minute. I saw them at a party like an hour later. Me and her talked like usual, she laughed at all the bad jokes, etc, but was sitting with the other guy the whole time. There was nothing but sitting next to eachother and talking going on between the two though.

What im wondering is guys, if you were in this situation, what would you do? Would you just try to be friends, leave her alone, try texting her, or just what you would do.

Girls: just any advice you can offer would be appriciated.

Thanks! -jon (long story for why my screen names corey, my names jon).

[lbe]

play hard to get
flirt with other girls while you're around her and see how she reacts