LOVELIES I NEED YOUR HELP PLEASE HELP ME!!!

Ok so my girfriend wants me to go to Vegas with her and her mom which is not bad of course. My problem is I don’t have any money, I’d just feel dumb going out of town with my gf and her mom and I ain’t got no money. So she mad like, “you’re really not going, you just gna leave me hanging.” Like girl please understand that that just makes me uncomfortable. I wish she didn’t take me not wanting to go because I have no money so personally. However, she is clearly upset and won’t talk to me, what do I do?