Having a female with you can be a huge advantage. It gives you a huge basepoint in social value as most girls will think that you are taken which knid of triggers a lot of switches in their minds about things like "well he has something to offer her maybe i can get some of that too".
Basically try going around with her and opening up sets , if its a mixed set of guys/girls she can help you disarm the guys and you can isolate the girls. Try it out and make sure shes cool with it. I have a girl who i thought was a good friend of mine but started getting jealous of me interacting with other women lol then it got quite weird.
Good luck!
