If 당신 ever heard of a person like this, would 당신 believe they have a pyschological issue..?

This is very important.
I know this boy who is madly in 사랑 with me. Atleast that's what he says, until after I keep rejecting him (because I already have a bf that I 사랑 with all my heart) after I reject him, he's starts making multiple accounts to torture me and my FP friends. He makes different accounts and adds me and I add people back. And whenever I add someone back I constantly get hate messages written all over my wall. Such as "YOUR A HUGE WHORE AND YOUR UGLY AF AND 당신 NEED TO GO CHOKE ON YOUR DADS COCK 당신 UGLY DISGUSTING WORTHLESS SHIT" and many 더 많이 harsh words..Same thing gets said to my bf on here. >_<












I hope this 질문 isn't annoying 또는 makes me look like a attention whore. I just really need some advice. :/ and a answer. So would 당신 say someone like this is a little....crazy? O_O