<human>: Can you provide a brief overview of the text?

Throwaway for obvious reasons.

So my GF recently got back from a week-long field trip thing with a bunch of other kids from our school down to the States. She had a lot of friends there which was cool.

But apparently she met some guy down there and they talked a lot while they were there. The first incident was when he asked her to a dance event that the school was running there. She turned him down on that one, which was pretty cool of her. But unfortunately the saga continues.

So after she's back, we're cool and whatnot but then I notice that she's texting this dude NON-STOP. Like, when we were hanging out after she got back, she was on her phone texting him. Literally that night she texted him until about 4 in the morning. (I stayed up until 4 because I didn't want to leave her before the other guy did.)

The day after that (today), she did it again and I did the same.

Now, the first night already bothered me a lot so I mentioned how this guy was making me super uncomfortable. She got really mad about this and said that this guy had a crush on someone else so I shouldn't be worried. She also did reassure me a bunch of times that she had no feelings for him.

But that didn't really make me feel any better? Especially since it happened again tonight (except this time I didn't mention it because I didn't want to make her angry again).

Anyway, I'm not sure what the protocol for this type of situation is because this is my first relationship with anyone so I'm pretty inexperienced. If anyone could give me some pointers, that would be nice!
<bot>: GF met some dude on a trip, says they share no feelings for each other. They texted each other until 4am yesterday and the day before. Not sure if I'm being unreasonable.