Is he hitting on me?

I think my martial arts instructor is hitting on me. It the begin he was civil and courteous. Now he teases me, picks on me, and gives me little nicknames (nothing mean). He'll do things like put his arm around me or he'll ask my pratice partner to pair up with someone else and he asks me to partner up with him. Once I injured my calf and he maged it. One time we were doing drills and I was holding those punching bag mitts for my partner and my instructor said I was holding it wrong and he came up behind me put his arms around me and adjusted my arms that way (u know how people do when they are teaching someone how to play golf). One time I decided not to practice some wrestling techniques with my partner so i sat there while he praticed with someone else. My instructor came over asked why i wasnt practicing I told him my calf still hurt and he wanted me to practice with him anyway! I don't know if he's just overly friendly or actually subtly hitting on me. What do I do? I am