While I had nobody tell me to kill myself IRL before, I find it truly sad that people even use that phrase (and mostly without thinking about the consequences, too). But still, every one who uses that phrase against someone else is a weak person. It only shows that they are jealous about something that you might have, but they don't. These people seem to think if the person, who has what they desire, is gone, then they can go and claim it for themselves instead, whatever it may be. So even if someone is rude enough to throw those hurtfull words into your face - always remember that you got something valuable worth living for that the other person does not have.