<human>: Can you give me the gist of the text in a nutshell?

You guys probably answer an overwhelming amount of questions like this, but recently, my girlfriend had a couple of people from her country move to our state. He showed up at her birthday party and ended up asking for her number on Twitter. They don't talk often, but they talk enough for me to notice it. They play mobile games with each other and stir up small talk. I told her this bothered me and she insisted that he's no more than an acquaintance, even compared him to a school friend. She said she feels more obligated to make him feel welcome to this country during the move than she does to really talk to him. Here's my concern though, she straight up told me that she does think he's cute after I asked. I don't know, I never thought of myself as the jealous type but now that I know this, it's driving me crazy. My heart beats like crazy, my stomach turns upside down and my face turns red. I have no reason to be upset with her because she hasn't done anything to betray my trust but I still do feel this way. How can I stop being so jealous or how do I deal with this? I don't want her to just cut off ties with people in her life because of how I feel about them specifically.
<bot>: Girlfriend finds another guy cute, insists that he's nothing more than an acquaintance. How can I deal with being jealous regardless?