I guess you're nervous about talking with her. That's pretty normal, even experienced guys are sometimes nervous before a girl.
1)Check your level:
a) Predator (the guy who already took your girl and gave her back as spoiled goods)
b) Normal guy (you have not talked to her yet, so this is your chance champ)
c) Cave Troll (no comment)
2) Check your strong points:
-Do you have a nice conversation level, being fun and original without being boring or a clown?
-Do you dress cool and have good taste?
-Are you Intelligent, athletic, resourceful or wealthy?
-Do you take initiative?
- Do you know female body language? (this one, IMO, is the base stone of your relationships. You'll know when you're fucking up things or when are you winning)
-Are you resilient to rejection? If rejected, what is your plan B?