Apparently I'm now a "guest" in my own bedroom

I (M) was getting a bit creeped out by my girlfriend (F)'s increasingly notorious dad bod. Just in the last two months it's gotten disproportionately worse. I'm not a fitness fanatic or anything, and I've made my peace with the fact that we're both aging together, but there's a difference between aging and just not giving a damn.<br><br>Anyway, so I get out of bed one night to take a drink, and as I pass her on the way back to bed, she leans over and pecks me on the cheek. I tried my best to play it cool, but I was more than a little incensed.<br><br>"Why are you doing that?"<br><br>"What?"<br><br>"Is that a fuck you?"<br><br>"What do you mean?"<br><br>"You know exactly what I mean."<br><br>"No, I don't."<br><br>"You know what, I don't even care why you're doing that. I just want you to stop doing that in the future."<br><br>"Oh, so now I'm *forbidden* from kissing you? What the actual hell is that?"<br><br>"It's just, in case you haven't noticed, you've been gaining a lot of weight lately, but now you're also just walking around the house in nothing but a wife beater and gym shorts."<br><br>"What's wrong with what I'm wearing?"<br><br>"Well, for one thing, it's literally a wife beater."<br><br>"Oh my god, are you actually *calling me fat* right now?"<br><br>"No, I never said you were fat. Just that you've gained a lot of weight."<br><br>"Well, *apologies* for not being a supermodel, but I'm comfortable with my body the way it is."<br><br>"I'm not trying to be critical, and I don't want to shame you. I'm just trying to tell you how I feel."<br><br>"Well, *you* could afford to lose a few pounds, if you want me to be honest with you."<br><br>"Well, I'm not trying to be critical of you, but I at least have defined muscles, and my muscles don't clearly look like they're sagging from the weight."<br><br>"I can't believe you. I actually can't even believe you right now. You seriously just... said that?"<br><br>"I'm sorry. I just don't like being kissed like that, because it feels like you're trying to humiliate me or something."<br><br>"Well, you know what? I'm going to stop doing that. Because you know what, you *are* right. I *am* fat, and so are you. And I'm just a guest in this bedroom from now on."<br><br>"What did you just say?"<br><br>"Are you deaf? I *said I'm just a guest in this bedroom from now on*."<br><br>"Well, you're not a guest. It's your bed and your bedroom, because it's *our* bed and *our* bedroom."<br><br>"*Not any more it isn't*."<br><br>"Fine, if you want to be like that, then maybe you should just take your fat ass and move in with your parents or something."<br><br>She didn't respond, but instead just turned over and started snoring. <br><br>I got up and went to the living room to crash, and the next morning I woke up to a completely empty apartment. So yeah, I now literally live alone in a place that was supposed to be for both of us, and somehow, I'm the "bad guy" in all this?