Could he like me if he keeps nudging me?

Okay, so there's this guy at work, I've known him for a few months now, and I like him, but I'm not sure if he feels the same back. He often has long conversations with me at work, and the subjects have been turning kind of sexual lately, he also keeps nudging me or brushing his hand against my arms, but then other times he just gives me weird looks, or avoids me and pretends he doesn't see me/wasn't looking at me. Is it possible he likes me as well?
Could he like me if he keeps nudging me?
Post Opinion