You're a college freshman, and you're buying this chick a 200 dollar jacket? Dude, there's tons of chicks in college, probbaly hotter than this chick. Go hook up with one of them. It'll be cheaper.
What's the point of having a gf at 18 anyway. Go hook up with diff. chicks, explore, have fun (always pack a raincoat though). You've got your best 4 years of life in college coming up. You gonna waste 'em on a chick whose hassling you to buy her a $200 jacket?!