What was it about your wife that made you married her? If you are not happy then why stayed with her this long? You know you're only burden yourself with her if you don't have feelings for her. Maybe it would be nice once in a while that you can help her and motivate her to lose weight. You can workout with her to gain strength and muscle mass while she can drop some pounds. Its really sad to see that you put up with a relationship knowing that you dont want to be in and will hurt her. How would you feel if your wife was the one who left you if you were about 300 lbs or so and she was thin. Isn't it terrible? You know, we're not made perfect. You married your wife because you're suppose to be her better half and support her. It goes both way not one way. Is looks everything? I'm sure your wife is a beautiful person in and out. And I'm hella sure that if you are willing to work with her and compromise and when you see her start to slim down, that could add some sparks to your love life. Nethertheless, no one should be put in this position of not being wanted because of their weight. Let her know that you care about her health and you want her to be healthy. Don't come at her and saying you have to lose weight b/c your fat. You know she will get defensive. I'm pretty sure if you tell her you love her and you want to work it out together then you will get what you want. And not only that, it will boost your wife self esteem up and make her keep herself looking good for herself and for you too. I hope that this helps and again, don't stay if u dont want too but yet again dont play with other peoples feeling. Think about this, what if you did leave your wife for a thinner lady then she becomes 300lbs. What are you gonna do? Leave her too? In this lifetime, you know what you have is good but then again don't screw up and go back to her once she loses weight as a way to get you back for leaving her.