Really scared, what should I do?

[TheGrimReaper]

Oh man I was just scared out of my wits. I was walkin out of my school, and this guy that I used to know was there with some other guy, so Im just like "k whatever" and walk off. About 5 steps later, the guy I dont know says "Hey thats him" so i'm like what? And I turn around. The guy I dont know says to me "Have you been giving crap to my freind?". I was tempted to say "Yes, a nice big one that I found this morning, but I know by crap, he meant anooying him, plus I didnt know who he was talking about, so I said "No, who is your freind?" and he said "It doesnt matter" So I said, k then and walked off. then he pushed me and said, what bus do you catch, and I said I dont catch the bus. He said "I'll get you soon enough".

Please help me guys, I dont know what to do.