Long distance?

So there's this guy and we were like in a long distance relationship but we never actually met in person and I kinda have feelings for him but it's a lost cause because we will never get to meet each other😢 so I asked some of my friends and they said to dump him. Should I have done that? But he also makes threats to me like when my friend was messing around with him he told me and he wanted to slit my throat open and stuff and he can be intense but yea