what do i do if i think i am being sexually harrassed at work?

I recently got a hair cut, n every since then my new general manager has called me sexy, has walked up behind me and has rubbed my neck, he is constantly taking a hold of my hand. A few nights ago he came right out n asked me when we were going on a date, n I just told him that he had a girlfriend, and then I walked away..well since then, he had acted totally different towards me, ex...we had a conversation about his top performers working 6 days, getting to make there own schedules etc. Well I have worked 6 days a week for a couple weeks, now I am only working 5 days a week, and I am having a really hard time getting him to seat my section, I'm a server at a Red Lobster restaurant, I have not said anything to any one about this, except my daughter. I just don't know what to do, I don't know if its my imagination, or if I am being punished for not taking his invite for a date . I don't want to make trouble, but I can't work like thus, n I really don't want to lose my job.