Hello boys, im happy to meet u here

Im mago and im from italy.
(First of all sorry for my bad english)
Tomorrow i want to sarge a really cute blonde girl who invited me at a party at her home.
I have already set some openers, negs and demonstrations of value but i do not know
how to isolate her.
i have chatted for her since she broke with her former boyfriend(2 weeks ago) and i usually talk and joke with her and i think she could be attracted from me
but the problem will be
1)we are at her house, everybody will want to stay with her
2)If her former boyfriend see i want to sarge her he will not stop to AMOG me
3)Time constrait: i have 3 hours before leaving her home, then we will go to disco, a very caotic place
Thanks in advance!