The problem is that I really like the attention but am worried that he is playing me... What does this mean? You knew from the first place that he doesn't like you, and you'll say that you are worried that he's just playing and you still go on with your feelings, then be prepared to be hurt, you ca...

I totally agree with Heather...Don't be afraid to say NO...Do not do things that you would regret later on. If he respects you then he would not insist. But he do insist, then he's not worth the stay.

If you are on the same building, 3 weeks is too long for the both of you can establish friendship. It is just a matter of who will make the first move to have a conversation. The difficult part here is on how to make the first move.