First time poster here looking for some advice-

So I am at a relatively small college, and I keep seeing a very hot girl all around campus. The problem is all I know about her is that she is a volleyball player (I am in Cross Country so I keep seeing her at the Fitness Center). We have made eye contact several times but I keep freezing and don't know what kind of line I can approach her with. Any ideas???

TL;DR- Keep seeing this girl, really need an opening line...