She's messing with your emotions.
Look at this, she KNOWS you are uncomfortable with her hanging out with him, YET she still continues to see him and hang out with him. Not only that, he's doing stuff to woo and pursue her and since you can't do anything about it, she doesn't do anything about it.
WHAT A FUCKING DISS TO THE FACE.
Dude, this is total disrespect. WE ALL KNOW IT. YOU KNOW IT.
She's hanging out with a guy everyday for the past 4-5 days. WHY? Doesn't she have female friends to hang out with? He compliments her, offers her rides, does this, does that, AFC signs show he's in love. She knows this, she has the feminine intiution, SHE IS A FREAKING WOMAN.
You don't need to talk to this kid. It's not this kids fault. You're out of town and she's all alone. Who you REALLY need to talk to is your girl. She isn't willing to tell ONE GUY to back off in order to keep you comfortable and pleased. She must not be much of a girlfriend then.
Don't even bother defending her, this is the TRUTH. She's taking in other guys as a powertrip, her own powertrip to make her feel sexy and wanted. Girls can complain or they can compliment. They ALWAYS FEEL SEXY when they are wanted.
The truth is, you can't control her from a few 5-10 states away. She can do what she wants now, you CANNOT stop her. That is why you should end it with her. This LDR isn't going to workout because of that. The kid probably doesn't just want a fuck, he'd go somewhere else easier than that, he probably wants a full long term relationship with your girlfriend, and you know what? She ISN'T GIVING ANY NEGATIVE SIGNS besides ASSUMING he won't do anything cause she still has you, her mysterious lover from Florida.
I'm telling you this right now from man to man, it isn't going to work out. But I know people nowadays are persistent, so I'll tell you what you CAN do, but I can tell you the odds of success are VERY low, just because your situation. What you need is for her to tell him to back off, as well as be the type of girl to do that. She is downright disrespecting you right now, and you shouldn't take that crap. What you should do is break it off with her, but you probably aren't so, you need a way to get her to act right, WITHOUT having her end up cheating and lying to you.
It really depends on her level of interest here, guy. Check it, if she was completely into you, would she risk her relationship on ONE MALE who is obviously interested in her with the risk of annoying you or even making you slightly unhappy?
ABSOLUTELY NOT
But she isn't that absolutely in love with you man, in fact, she's going out with another guy and telling you about it. But not only that, she says nothing will come of it.
When was the last time a woman did NOT reject a guy and he went away because of it?
Think about it.
NEVER!
Unrejected guys don't leave, THEY WEREN'T REJECTED. There's only UP from here baby, and that's where he's aiming, and she's left an opening the size of the moon.
You can't hold your women in check, you can't check the guy, you can't trust her from this far away, she can lie to you and you'd never know, the possibilities are endless and WILL fail you. If she was absolutely into you and could stand this sort of thing, she would not risk having you uncomfortable. She'd be appauled if you started hanging out with another woman who thought you were the hottest man alive, she'd go crazy and hate her, then the woman gives you buying signs, and you tell your girl that you won't do anything about it since the other woman probably won't do anything cause you're already in a relationship.
SEE THE TYPE OF BULLSHIT THERE IS NOWADAYS?
My ultimate advice man. Break it off with her. Don't let her get away with this sort of stuff. You're away and she's taking advantage of the time by hanging out with ONE GUY out who is giving her all the signs and her no rejections to them. She might refuse the drive home, but she doesn't refuse talking to him, seeing him, catching up with him, GOING OUT WITH HIM.
I'm only trying to help you here, but there isn't anything good coming out of this. A lot of guys here just absolutely hate LDR and say they don't work. And for the most part, they DO NOT WORK. But I've been in one before and I've delt with the experience, and unlike most LDRs, mine worked out for me. But if mine had this sort of disrespect, I would have dropped her a long time ago with a big "NICE KNOWING YOU" card in the mail and be dating another girl that very night.
It isn't worth your time to pursue this one. You're at college, you don't need stress, kick back, relax, and find someone else.