Relatively new relationship, I'm not particularly invested right now, and am just enjoying the fun (we're 17) but now that she knows all my friends, she's been flirting with them a bit. At first I didn't mind, but it's getting quite overt right now. Honestly, considering my friends are mostly gay/in relationships (she doesn't yet know this) I'm not concerned about her cheating, but more about how I can continue to hold frame and how to respond. The flirting is mostly just making comments about how attractive they might be on a certain day, touching them just a bit more than necessary, getting the odd hug/piggyback/affection here and there, etc.

So far I have been completely ignoring all of the flirting, as if I didn't even know she was talking. This worked initially, made her slightly insecure and unsure, but now she's getting more confident in what she's doing. I have good friends who are loyal and brushing off her actions completely, thankfully.

Any advice for this kind of situation?