C'mon man- you're young and in college- pound that shit until she can't walk straight for a week. If she turns out to be crazy-clingy- even better for the short term- crazy chicks will let you do practically anything to them in bed. So saddle up, pound that cowgirl(preferably with the boots still on), do as many things as you can with her sexually and then when it gets old or too clingy walk away.
Yeah crazy chicks will cause some problems after you break them off- hopefully nothing like Fatal Attraction crazy more along the lines of coming up to you at party later while drunk and announcing you have the smallest cock she's ever been with to try and embarrass you for dumping her.
All of that doesn't matter because when that happens- just start a slo-motion replay of all the things you got to do sexually with her and it's all good.
Take it from someone older- you have to go through the super-crazy ones first for the sex and second to learn from it and use for perspective later in life.