There are gay guys in Wisconsin, it's just that most of them are online or in closet. JK
Seriously though, have you thought about moving to a city like Chicago after graduation? I'm from Chicago and there's a pretty big gay scene there, lots of guys moved there from surrounding states who escaped for their small towns. The city is where it's at when you're single.
Don't worry, you'll find someone. There's some guy out there who is looking for someone exactly like you. You just have to go out and find each other- online or off.
And if it makes you feel any better, I live in NYC and I still
don't have a boyfriend. Though, most of that can be chalked up to being shy.