<human>: Give me a shortened version of the text

First off, I have to say that this relationship is going very well. We moved in with each other back in April and we still haven't killed each other. Success! 

Here is what I am having trouble with:
Since the beginning of the relationship, I have introduced my GF to a number of awesome new foods and restaurants. Before meeting me, she would go to the gym all the time and keep to a fairly strict diet with just one cheat meal a week. She even inspired me to start working out and eating better. Even a year or so into the relationship, I notice that she has put on a little bit of weight but that doesn't stop me from enjoying her company and sex. In that time leading to now, we have had many attempts to reboot our physical activity and healthier eating. However this has been in vein. 

I hate to feel like I am having a superficial issue with this girl. But it has also been coloring my physical attraction to her. There is an emotional attraction that I have to her that is stronger than ever. I just don't want to have sex as much with her because of the weight gain. And I know that sex isn't the be all and end all of a relationship. It is a part of the relationship that is lacking overall since the rest of the relationship is great. 

The question i want to ask is this: Is there a way that I can bring this up to her in a way that doesn't make me sound like a dick?

I know she wants to lose some weight, but, from my perspective, she isn't putting any effort toward it. What can I do?
<bot>: Got in a relationship, we got happy, she gained some weight, I don't want to have sex with her as much, and I don't know what to do.