He's getting flirted with and I'm jealous

He's handled it fine, but I have this one girl stuck in my head. I thought she was unattractive but when I asked him what he thought of her he said she has a baby face. He's known her acquaintance friends, and she saw me with him and as soon I stepped away to go to the bathroom she was all over him (touching his arm, telling him how long it's been since she's seen him), even when I returned she didn't stop.

He didn't stop her and said he was basically ignoring her, she's annoying and the bar owners don't like her she's an obnoxious drunk. She left the guy she was with to come over and flirt with my guy. I'm most struck by the fact when I returned she continued her rude behavior. How should I have handled it? I really don't handle social situations well, but I was shocked by how forward she was.

He had another girl ask him out at the gas station he frequents, he said he has a girlfriend.

Ignore her.

I did. He said he was hoping I would punch her out. Not my style but made me chuckle.

I have encountered women like that before. They are pathetic, low-class, and will always be trash. And deep down, they know it.