My school has traveled to a trade show with 10 students. On the drive up this girl and I got along really well. We've been hanging out exclusively for the last 4 days or so. Pretty much if either of us are going to do something, we both go.

To add some context, there is a lot to see and do at the show, so we are going around together seeing and doing things. I hate the to put the pussy on the pedestal, but I really don't think I've gotten along with another girl this well before. I'm having a great time hanging out with her, and she wants to hang out with me, so I think she is having a great time too.

I am having trouble making my intentions clear however. She has been talking to another guy for a few weeks. They're texting/snapchatting often. I asked her today if they were going out, and she said they've just hung out a few times. Because of this, I'm not sure if making a move is inappropriate. I feel like just trying to hold her hand and seeing where that goes would be a good indicator for what the situation is.

Or maybe saying something like "Hey, I've had a great time hanging out with you for the last few days, after this trade show I want to continue hanging out"

This is definitely the weakest part of my game, is finding out how to make my intentions clear. I have this problem with all women. Figuring out the difference between someone being nice and someone interested in you. Is the only way to determine the difference by making a move?