In extreme depression …I just need advice

So I’m pregnant again by 2 of my kids father and I told him to be courteous and nice, he has been saying extremely mean things to me ever since I told him…tbh he always says extremely mean things to me anyways as he abuses me physically and mentally…but all I’ve been doing is crying lately as he calls me names like “stupid, bitch, whore, miserable bitch, fat bitch etc” and threatens to push me down the stairs… I’m on baby #4 and I love my kids but mommy is always depressed and unhappy and they deserve better…maybe it’s better for them if I just kill myself 🥲