I see flirting as alright, and if the person your flirting with invites you to hang out, than go with them, otherwise just leave them alone when they leave, don't follow them. It's like when I was talking to the person who was in the hotel room across from mine. I talked to her, she left, than later on that night, I saw her again, and asked if she wanted to come hang out... She didn't go back till around 4... The next day, she came and knocked on our door and we hung out some more.