Problems at work? What do I do?? (Please help!)?

[BSBfan22]

I was friends with a guy I work with on Facebook. I put my senior pictures on there (which were very modest) and he commented on it saying, "you are starting to look very sexy". He's 50something and married; I'm 17. He's made other remarks at work that made me feel a uneasy, but I ignored them.
So when this happened 2 days ago I talked to my boss and she called him and told him that was unacceptable & reprimanded him. She gave me this Saturday off so things wouldn't be so uncomfortable for me right away.
So I made plans this weekend that are very important to me. I got a text from my co worker saying her and my bosses are begging I come in because it'll be really busy.
But I already made plans that're really important to me, AND I don't feel comfortable working with that guy anymore.
What do I do?