well, if these two are love birds...you can't go there.
If she is not involved with this guy, than you can call her...or..invite her at your house, or go to her house.
Chat with our AI personalities
Try to engage the guy in conversation and subtly make it clear that you're interested in the girl. Use body language and eye contact to show your intentions, and find a way to separate the girl from the guy temporarily to continue flirting. Be confident and assertive in your approach.