So I have had a girlfriend for 7 months, and I love her to pieces. She's such a wonderful girl, and all I want to do is make her happy. Sometimes I feel like I lose my mojo and when she wants to please me or have sex with me, sometimes I'm too tired or I get it up but then shortly thereafter it goes back down. She doesn't like it when I look at porn, but I try to do it sometimes just to see if I can fuel my sex drive. It works sometimes, but she clearly gets frustrated when my dick goes limp if I'm not into it at that moment. She feels like she can't turn me on, and I don't want her to feel that way; it's just that we spend a whole lot of time together, and I want it to be more of a special thing than an obligation. I want to make her happy, but sometimes my penis just isn't up for it, and that makes her really sad. Shit, during those times, I don't even think that porn would get me excited or ready to have sex. Does anyone else ever feel like this? I want to make her happy but sometimes I fail at it. This happens occasionally, where I will go for 2 weeks nailing her, but then go for 2 weeks where I don't want it very often. I hope I'm not the only one. All I want is for her to be happy, I want her to stay with me, and I feel like a loser when I can't please her in bed. Any advice?