What would you do ?

Let me start by saying my partner and I have been together 3 years both 28 now. We argue alot so it's nothing me but tonight just pissed me off. I asked him to cuddle me ,he rejects so I roll over to go to sleep, dude gets right on his phone so I said wow , right back to the phone. (He's on his phone constantly and it has been an issue with lacking attention,sex, etc ) he then proceeds to say your acting weird like your on drugs and starts a big fight. Dude said I'm sniffing shit up my nose 😂🤦🏻‍♀️ it's funny but it's not I'm actually really mad and we just fought horribly for an hour . just crazy how narcissist he is an manipulative. How in the hell am I minding my own business and get accused of snorting drugs under the covers??? I'm at a breaking point. Not to mention we've been planning our elopement and he's been saying oh I can't wait and I love you blah blah and now when he starts his B's he says your pressuring me to marry you and all this shit. I seriously am glad this argument just happened I know where I stand with him and I'm ready to save some money and get out 🤷🏻‍♀️ he doesn't think he has an issue at all but it's really out of hand