What do you do if the girl you like is flirting with other guys?

Well, I have a girlfriend now, so this doesn't really apply to me. However, if I just like her, and it doesn't seem like she's interested in me, then I'll just leave it alone. Otherwise, if she seems to be interested in me, and other guys, then I just gotta step up my game. :D

I will probably observe him for some time and if i realise that its in his nature, obviously feeling would change for him .

I probably would leave. Disappointed. Sad. But I am not the type to take action. =(

I don't like to see my partner flirt really. And he HATES when I flirt or even utter that a celebrity is cute. LOL I don't really see my partner flirting though. But once I saw a girl flirting with him. I thought "hello! woman with three children here!" LOL Once a guy flirted with me in front of him and he insulted the guy and called him a loser. I am not really bugged about any of these things though. When have been together a long time and I feel okay about us.

Well, this is from the girl perspective, but I definitely don't like it. If they're mine, then I feel like they have no business flirting with anyone else. [I'm posessive like that.] If I see it I probably wouldn't say much about it, though. I lack the backbone. Eventually, if it became a big issue I'd mention it, but I don't like to stir up trouble based on a one time occurrence. As for me from a guy's perspective, I've noticed I'm an unintentional flirt. I don't mean to, it just happens around guys that I don't hate. It tends to be a struggle to make sure that I keep things on the platonic level, because I've noticed that what I consider to be just being friendly often gets taken as something else. :/ Maybe I'm just naive when it comes to that sort of thing.

Leave, or maybe keep him observing if he really a type of guy that always flirts..And if this is really his nature its really a big turned off... :(

When a guy I like flirts with another girl then I normally just walk away or ignore it so I don't get hurt any more than I already have. Then I just try to stay away as to avoid any more pain.

Honestly if you like someone and they're not 'yours' then I say either speak up and let them know how you feel of them or let them go and take the lfirting as a sign that they are interested in another person. What I will say is you dont' want to live life in regret. So if I guy I like was flirting with other girls I'd let him know how I felt about him and see what happens from there on out. In the end I'd be happy with at least getting it out.