Resentment can be a real issue for you in your love affairs. Even when you haven't known a lover long enough to build up any store of hard feelings toward them, there they are anyway -- bitterness, anger and resentment, welling up inside you, and coming out in all sorts of ways. For you, love isn't a fun or light experience; it's a power play, where one person always has to be in control.
Needless to say, you want to be that person! And you do what it takes to stay on top, using tactics on your lovers that, if you really analyzed them, you might not be too proud of. It's not that you mean to mistreat anyone, either; especially not someone you care about. But when you feel backed into a corner, your instincts take over, and they tell you to use any resource available to push for what you want. Jealousy is also a big issue for you in a love affair, and possessiveness is a natural response to those dark feelings. So is manipulation; you may try to control your sweetie from behind the scenes, or through emotional tactics. Taking a more 'live and let live' attitude in your love affairs would make things easier on both you and your lovers.