>>Here's some backstory -- included because I think it could be relevant.
At the beginning of the school year, the weekend after moving into my dorm at college, I took two friends and went to a club. We were just dancing, not minding girls too much (grinding with them as as often as the opportunity appeared and was taken). We were having fun and decided to dance in sync with each other. A girl approached us and commented on what good dancers we were. She introduced herself, and left it at that.
The following weekend, I went to the same club -- alone this time. I saw the girl again and she asked if I remembered her. I did and she asked me, as she was about to leave, if I had her phone number. She then gave her number to me.
I texted her sparingly.
Two weeks later, (I go to that club nearly every weekend) I went back with a few friends. I saw her once again and she said hi, hugged me and all, introduced me to a friend of hers, and joked that the alcohol they got from older guys had rohypnol in it. Thinking they might have been trying to make an orbiter out of me, I playfully walked away (got them to laugh a little). I let her know that I was with some friends and I'd see her later. She told me to text her.
>>End of backstory.
I don't text her often because when I do, she may or may not reply, understandably.
I called her once to make plans, but she didn't answer. I got a text later asking if I was alright since I called. I'm not sure how to proceed.
College Freshman -- Dating Freshman, too. 
A pressing question: Multiple encounters, phone... 
