Hi PEACHES99,
It's certainly sad and a huge stress when you are focusing on your daughter's wedding, yet your significant other is threatened by this (normal thing) to emotionally deregulate and be abusive. You mentioned that he's violent. How is he violent and has he been like this in the past?
I hope to hear more and how best we can help support you
p.s. your post was moved to Bettering as the members here can provide good support while you are in your relationship and recommend tools to reduce conflict.