I'm getting harrased by coworker

My coworker is harrasing me. I tend to ignore them when they are doing things I dislike. Today they put thier arm around me and asked why I'm single. They did this Infront of another coworker. They said we should be together and I moved away. They had a fit and said I was trying paint them like a Villian and called me an asshole. The boss already warned them to quit Thier behavior. What do I do at this point? They don't seem to care. Literally all I did was move away. My other coworker said "They were clearly in your space and you felt bothered. They need to stay out of you bubble".