I've always wondered about people who are only interested in your company when their friends aren't around them, they're alone and they're just bored. 

Why do you give me your presence when we already know who you will choose in your free time.

why use other people, give them hope, tie them to yourself, then put them away? 

why all this, don't make me used to your presence if you're going to leave anyway.

I don't have anyone, but I wouldn't take advantage of other people's time so easily, with the awareness of the pain that can be caused to someone unknowingly..