I Have Social Anxiety

Today, I was registering for my next semester at college, and I noticed these two girls there as well. I wanted to try and talk to them to get to know them better and possibly be friends, but I felt really awkward and nervous and they kind of kept walking as I tried to talk to them.

I don't know if I creeped them out or not or they just weren't interested in talking, but I'm very embarrassed at the moment and I just want to hide from everyone right now.

Anyone have any advice?