Men of Dating.mobi, how do you deal with the waiter flirting with your date?

I clicked with this girl on Tinder and we decided to get drinks at Bahama Breeze (not the fanciest place but good enough for college kids) the other night. We met and everything was going great. We were sitting at the bar because she wanted to, and getting to know each other when the waiter comes over to ask for our drinks.
She orders a Margarita and he goes, "Really? I thought you'd be more of a pina colada kind of girl." She goes, "Oh, what makes you say that?" And he says something I don't remember, but they start CONVERSING back and forth and I'm sitting behind there awkwardly like uhh. I mean, I'm usually pretty loud, but I didn't want to come off as being jealous or whatever so I just kept my mouth shut until I found an opportunity to jump into the conversation and chimed in with my opinion. He then FINALLY noticed me and asked if I wanted anything and I order a Mai Tai and he's like alright man let me get that for ya.
Easy mistake I thought, he probably thought she was single considering she was sitting at the bar? Whatever. I'm not letting him get to me. Anyway, we start talking until he comes back with our drinks and he looks at her and goes, "I got you 2 pineapples in your drink because you're special, but don't tell my boss or I'd get into trouble." At this point I'm starting to get slightly annoyed but he walks away immediately after that instead of staying to talk so it wasn't that bad.
We're now ordering food and I order just the salad because I actually like their salad. She orders fish tacos and he uncreatively (same ****ing line as before) goes, "haha, I pictured you more to be a Steak kind of girl." And she replies with I LOVE steak, I was just ordering these because he points at me ordered the salad. I just shrugged like haha.. they then start talking about restaurants around Gainesville that serve good food and I just pull out my phone because I'm done at this point.
After he leaves, I excuse myself to use the restroom and when returning, I see him at our table AGAIN talking to her. By the time I walk to my chair, he's making her laugh and he walks away after seeing me. I am completely thrown of any game. He was also kind of good-looking so it threw me off even more since I'm not nearly as physically attractive.
At the end of the night, I ask her if she'd like to go for a walk outside but she says no because she's meeting her roommate here later. She gave me a hug goodbye.
So, men of Dating.mobi, how would you have dealt with the waiter in this scenario?


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