No, my love life isn't suffering because of my weight. It's because of my wife's weight.
I'm in fairly decent shape, but my wife has been progressively putting on weight until she's now about 60-80 lbs. or so overweight. It's been getting gradually worse in the last few years, and it's still going. Because I work so hard to keep myself fit, she continually tells me how sexy I am, how good I look without a shirt on, etc., but I can't honestly return the complements except to say how nice a dress is on her or something - a complement based on the clothes, not the body.
Part of me wants to return her complements, but I just finding her increasingly less physically attractive - big shocker there. I love her dearly, and my love isn't based on her weight; I'll love her no matter what. But obviously we all find someone in shape more physically attractive than someone, say, at 500 lbs. Although she appears to be happy when I tell her that I've lost another few pounds or how good I feel after a good workout, she still eats her big bag of chocolates, her ice cream, cookies, pasta, waffles, etc, etc. No slowdown.
(I've noticed that people who care about their bodies and work to stay in shape tend to pair off with others who feel the same way, and those who let themselves go and who couldn't care less how much they weigh also pair off with other overweight people. After all, if you don't care how you look, why should you care how your partner looks?)
So I've given up trying to "convert her" with my talk of personal dieting and exercise (hoping maybe it would rub off on her). She's obviously not ready to lose weight, even if it means that her health is at risk and our love life suffers for it, and it does, believe me. She seems sometimes frustrated that we don't "have fun" more often than we do, but there seems to be a disconnect in her mind of why that might be - hmmm. She even mentioned to me once that maybe I should go see a doctor on account of my lack of libido. Talk about painting me into a corner! The angriest she ever got at me was when I alluded once that she might want to consider losing some weight; she hardly spoke to me for two days. I'm not about to mention it again, and I don't have a problem that a doctor is going to fix.
At this point I continue to buy her her favorite strawberry-swirl ice cream, her M&Ms, her Little Debbie snack cakes, her McDonalds fast food, etc, because I know she enjoys them. If she gains a hundred pounds, well, I don't have any control over that and I can't change her. If she ever does decide to go on a diet, of course I'll encourage her all I can. But I hope she understands that becoming obese carries its own consequences, many of which are more unpleasant than merely being hungry.