It was going well until ex-boyfriend showed up

Hi guys. So that I don't bother you, I'll make a resume of what's happened.

- 1st night: Met a HB girl trough social circle. She was into me. I didn't play game for technical reasons. Didn't get her number.
- 2nd night: 2 weeks later, she showed up again in a night out of the group. Talked the all night, built confort. She kept giving strong signs she was into me. For technical reasons again, didn't get her phone.
- 3rd night: Met her by accident (I think) in a concert when I was with a common friend. She arrived late and came next to me the all time.
- Later the same night, in a bar I suggested the group to go, her ex was there. She stayed back with the guy when I left with other friends, but asked for my contact first in front of the guy (she asked if we could talk in email, FB) I just told her to give me her phone number so I can ask her out. Of course I knew she was also asking this to make the guy jealous.
- 24h later I sent her an SMS with call back humour, stating confidence and don't needing response (although, yes, I would like one, thank you very much).
- 12h later she didn't still respond.

How to proceed?
- Long fuse SMS way?
- Wait for chance and us to meet again trough social circle and her ex don't show up?
- Use FB instead of SMS?
- Give time out for her to get over the guy?
- Other way?

Looks obvious she's not over the ex. Don't push. You can send her a friendly SMS but not too often. It's better to just let things happen. Give her time to get over her ex.

Hmm, talk to her on facebook first. Get to know her before asking her out on a "date"

Get to know her more before the asking her out, either thorough Facebook or other means, especially if she's still obviously not over the ex.