I once had a boyfriend tell me we shouldn’t be living together. I knew right then it was over. I instantly moved out and we broke up a few days later. Calling off a planned wedding is a huge drop, she’s stepping out of a commitment most girls take to heart. This is what I think: Your partner isn’t sure your the one, but feels guilty and scared to be alone so she doesn’t cut you off. It may be rough at first, leave her or you’ll just end up being a wing-man until she finds what she’s looking for.