I'm a new freshman in college and an older guy asked for my number at a party. It was loud and dark and I didn't know what to do in the heat of the moment, so I just put it in his phone. He texted me today just saying he enjoyed meeting me, and now I don't know what to do. I don't want anything to do with him but I feel bad that I gave him my number, probably leading him to believe I did. It makes me uncomfortable to think about him having my number and wanting to see me again when I barely remember what he looks like. What should I do?