Last year of college, apparently I have a bad rep, how to change this?

I’m 25, I’ve got a year left at college. Recently, my main goal for a while now has been to… get laid. I’m somehow still a virgin, despite having asked out like 10%-20% of the entire female population of campus lol. And apparently I’ve heard some of the girls who’ve rejected me recently say I have a ‘bad reputation’… How can I change this, and get laid within the year? I refuse to leave college a virgin. Any advice?