When I put an engagement ring on my ex-fiancee's finger and she moved in with me after we had been dating six years and known each other for 10, her true colors came out. We were long distance (8 hours or so away in a vehicle) for our whole relationship, but we saw each other at least once a month and spent three to ten days together before being away again for a few weeks to a month or so. It gave us time to miss each other and I truly believe that we were so used to having our own lives and our own privacy away from each other is what drove her to become what she became. Severely psychologically abusive and somewhat controlling, she would gaslight the fuck out of me all the time about things that happened or were said less than five mins ago, physically abusive a few times when she hadn't ever put a hand on me previously and I never had put my hands on her either, and she quickly became a boderline alcoholic. We were together almost six months after I proposed and my friends and my mom had to give me an intervention and pull me away.