I think this belongs more here than in the relationship part..

I go back to the same job every summer. I have for the past 4 years. Last year I got sexually involved with a guy I worked with. Things got all messed up due to lack of communication, and I ended up getting very hurt. He was never mean to me or anything, though, we were still friends after it all ended. Summer ended and I went back to school. We didn't really keep in touch, we talked maybe twice, and once was just me asking if he still works there. He does. I start that job later today, at noon. I have SO much anxiety. I'm not worried about the job, but just worried about seeing him. Will I start to cry? Will I get mad? How will he act towards me? I am very nervous. Any advice?