18 year old makes me feel scared and threatened?

This kid just graduated high school and he s 18. I go to the skatepark a lot. And he s always there. And most of my friends hang out with him. I didn t know he had a problem with me until yesterday. I went to go sit down with my friends. And the 18 year old kept saying go away go away. I ignore him and sit down anyways. I ask does anyone have a skate tool he stands up and yells did you not ******* hear me. Get the **** away. And slaps my bolts I had for my skateboard out my hand. I walk Away and he comes up to me and tells me and my other friends. You guys talking **** huh. We tell him no. He then says if I ever hear your ******* talking ****. He then eyes us out. And leaves. But like I hate how he s trying to act tough to a bunch of freshmans.