cockblocking

I met a swedish HB in a park yesterday and it went solid. We had a good chat for nearly 20-30 mins with lots of flirting and deep diving. Throughout the interaction with her, I noticed two guys (one a new face who was watching from the front and another day gamer who I have seen approaching...

I ran into an issue with someone close to me, when I was flirting with a girl who was way into me. In such a case, what are my options? Essentially, take ownership by saying I am flirting, and joking about being old and creepy like Craig Ferguson, or something?