Well this happen today, I was at a bar watching the UCL Barcelona vs Arsenal and I spot this cute girl checking me out, so after the game was over I reach to her and ask for her name and told her that she was really cute! He asked my name and after a very small talk she had to leave, so we said goodbye and that's it.

I didn't ask for her phone number, so. How can I approach to her without looking too intense?

I though maybe adding her on facebook and maybe chat through there? I only looking for a friendship here, because IMPORTANT, She has a boyfriend, and I'm very respectful about that! I want to be his friend and maybe hook up with one of her friends :)!

It's complicated I know! but anyone has a piece of advice?

P.S. Sorry about my grammar english isn't my first lenguage !