I'm starting to think this is the end

Things between me and my man just aren't looking too good anymore. And i really thought we where brilliant together. Ok so he's a pot head, has been smoking it for 15 years flat out. But has decided lately to come off if. But it has changed who he is. He isn't as affectionate toward me, we don't have sex as often as we use to, and he has become soooo snappy. And cheeky. It's like he's slowly now showing his true colours and I'm starting to think I don't really like who he is. I can't seem to talk to him about anything anymore all his feedback is becoming so snappy and negitive. Just a small example, I was always able to talk to him about this app. And how cool it was and read out little funny stories to him etc and he was all for it, and encourage that if I ever needed advice etc, don't go to people we know ask glow. He works all day everyday so he knows it's like my wee world in my own time. And it never was an issue but now he's like, wtf is it with you and this fucking glow, you treat it worse than fucking Facebook. 🤔😕.... we don't live together yet, and he's also been making snappy remarks in my house like "see when I move in here, big big changes will be made, big changes, like that won't be lying there anymore" etc. Well sorry bro, you will NOT be moving in. Unless you leave that fucking new found attitude at the door. I'm starting to really question do I want this. The last few nights I spend with him I ended up having to leave and go sleep in another room. I just couldn't even tolerate being near him.