<human>: I really don't know how to deal with this.  I've been with my girlfriend for 9 years and we're planning to get married over the next year.  We're pretty good about communicating, but this is one subject that I just can't bring up with her.  I need some advice.

Timeline - she's put on about 60 lbs over the past 5 years.  Three years ago, I started a medication that diminished my libido, at which point she noticed that we weren't having as much sex, and that I was apathetic towards it.  We blamed it on the medication, but in part it was because she had put on weight.  I stopped the medication after two years, putting us at a year ago.  Things picked up and we started trying new things and we were good for a while.  We're now at a point where she's happy with the level of exploration that we've done and feels inadequate every time I suggest we try something new.  The basic problem is that I'm so much less physically attracted to her that I only get turned on if we're exploring some fetish of mine, which she often refuses to do.  We both recognize this disconnect, which she still attributes to the medication, which I haven't taken in a year.

Sex has become a more of a selfish endeavor where I try to satisfy my own kinks and bring her along because I am no longer physically attracted to her.  

There are many more details, and I'd be happy to clarify anything in the comments.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Girlfriend put on weight, I am less attracted, sex is more selfish on my part to compensate, don't know how to be honest without mentioning how her weight affects my attraction to her.