Skipping class, but have ok grades.

I'm skipping class due to anxiety and nervousness. I'm a very social person, but I went through a phase where I thought I was ugly and any girl I talk to thinks I'm creepy. I got over it, but I still think a girl in one of my classes thinks I'm creepy. This has manifested itself in fear of everyone in the class. I have B's as the class is based on essays and all notes are put online. I have a lot of friends and they say it's in my head. What should I do? Is it too late to salvage the class or should I show up? That said my class has <10 people in it. The teacher isn't a very good prof (hard to understand, keeps a slow pace and sometime confuses the issue) She is a great marker though. I have been justifying my skipping because of this. Please put my head on straight.