Ever have that one person in your life that you just can't give up on

Ever have that one person in your life that you just can't give up on, the one person that can screw you over time after time yet you always seem to give them another chance. Doesn't matter how many times you say this is their last one, you know it's a lie, because there's always just one more waiting for them. The one person you know you're better off without, but yet you can't find a way to let them go because deep down inside, you wouldn't know what to do without them. The one person you know doesn't deserve you, but yet you choose to overlook it because you love him.