I Am Unhappily Married

I'm not sure what got this snowball moving this morning. Since deciding to leave it's been hard for me to be around my spouse, probably feelings of guilt. However, this morning for some reason I just could not take it anymore. I was very irritable with him and we got into a fight in the grocery store. After I put the groceries back and got into the car, I blurted out that I was going to start looking for a room for rent because I just couldn't stand being near him any longer. I explained how I know we aren't going to be together forever because I don't really believe in monogamy and he knows this. I've asked for an open relationship many times. I said I was ready to let him go find a woman who does appreciate the thought of forever because she will be a better fit for him. That was all we said and I've been sleeping all day every since. Feeling shitty and scared. Don't have anywhere to go yet, but I e-mailed a bunch of rooms today. Here we go.