What should I do?

Hi everyone......
How are you guys......? well, now I have something to share here.It's not a good thing for me T.T

I met this Black guy just now(you know who I mean right? with black). I'm on my way home from class, and he suddenly walk beside me.
He said hello then I said hello back to him. He ask me am I student here. He keep following me and he is scary!!!! He is BIG, BLACK, BIG MUSCLE, wearing a cap, and a 'bling bling guy' for sure. Then he keep asking me things! He ask me my name, I said my name is Yina.

Guess what he said next.

He said my name is the same as his.......(I dun really pay attention to this) wife!!!!!
Wife or girlfriend I dun care bout it, then he ask me what course that I take and finally he said he wanna be my friend and ask me my number and OF COURSE I said I DUN WANT TO GIVE YOU (in a good manner for sure).

Guess what he said next.

He said 'ok then, take care of yourself and becareful'

!??!?!? take care of yourself and BECAREFUL

Ok that's fine, I din bother it, I buy myself some dinner and he left. Until a minute later, he walk pass by and said the same thing to me 'Yina, take care of yourself and BECAREFUL. Bye'

HELP ME!!!!!!!!!!!

From,
Miaow