<human>: OK, so I am 24, she is 34 and have been dating for a little over a year and a half. The relationship has been fantastic and without faults, minus the elephant in the room.  Her sex drive has always been through the roof, and mine is pretty high as well. I just have gotten used to having sex with her; causing me to lose interest. I have no problem being with her if I'm already horny, but I never think about having sex with her. I'm always thinking of what it would be like with other girls, sometimes younger girls who have the bodies to go with it. What is killing me is that this woman is my best friend, an awesome partner and if it wasn't for this issue everything would be PERFECT. I'm scared I'm not sexually attracted to her anymore and am not sure what to do? Any ideas?

Can you condense the text into a few key points?
<bot>: Attractive cougar girlfriend is awesome, but I'm an idiot and don't want to bang her anymore. Feel like shit for it.