My 13 year old nephew is obsessed with me
I have just turned 20 and my nephew is 13. He's way too fond of me for absolutely no reason. I'm saying absolutely no reason because I don't really talk to him or approach anyone to talk that much at all. I keep quiet most of the time. It has come to the point where he touches my hair constantly when he's around me. Yesterday at the mall he kept pulling and touching my hair even after I asked him not to do it. He also pulled the hairband from my hair and threw it away. I was boiling with anger but still I didn't say anything to him. I'm more mad at his sister and my half-sister who is his maternal aunt because they didn't even tell him to stop doing it to me. We're not close family, they came here for vacation and I was only accompanying them. At one point he held my hand which he wouldn't let go for hours and hugged me tightly. What should I do? Is it normal behaviour? This makes me extremely uncomfortable and I can't even say it out loud to them.