<human>: Provide a brief overview of the text.

Hello /r/relationships,

I am [18m] in college. I have been out and partying a lot recently, and have met some nice freshman girls on my travels. One girl [18F] stands out above all of the rest. We have hung out a few times over a 2 week period, and each time makes me want her more. When I asked her about dating, she mentioned she isn't over her "summer fling" [20/M] from her hometown. I enjoy time with her over everyone else, but I still want to get out and "explore". 
Essentially, my question is Would I look like an ass for hooking up with other girls while liking her? Could she be testing me to see whether I stick around? What should I do?
<bot>: Nice [18F] has an "fling" that is keeping her from getting serious. Should I stick around?