Get over with the main source of stress, once and for all.
I can't imagine losing my freedom again, and living by someone's clock, and constantly on my nerve.

That's what change is for. I have seen and heard so many people that are living with each other, and once they separate, they just realize why did they do it so late, and bothered each other for many years.

So, my algorithm, rinse and repeat until you find the right one, without any commitment.
In another language:

living = 1;
int goodLife () {

partner = newPartner();
while (living) {
if (!happy() || !free() || onYouNerve()) {
relaxAndThink();
ditchPartner(partner);
imagineABetterLife();
partner = newPartner();
}
waitAndAssess();
}
}