<human>: I've been with my fiancé for a duration of almost 6 years, engaged for 2. Our sex life has been great - 3-4+ times a week. It's dwindled down since we've moved in together but was still pretty frequent. Recently, for the past 2 months or so, I've stopped initiating sex because I'm becoming too insecure about my body weight. I've gained a few pounds (10-15ish), but enough for me to feel too self conscious about it. I don't feel sexy anymore, and I feel like he doesn't find me attractive anymore either. Although he always tells me otherwise.

 Attempts I've made to lose weigh I.e running with the fiancé have been squashed because he just makes fun of me. The way I run, how I always stop to rest etc. it's very off putting and so I've stopped trying to exercise. He still initiates sex maybe once a week, but it's becoming more infrequent because I am no longer making moves anymore. How can I bring this up with him without it seeming like it coming from out of the blue?

Can you give me the gist of the text in a nutshell?
<bot>: I have gained a few pounds and no longer feel confident in the bedroom. How can I bring this up to my fiancé without it seeming like it's totally random and coming from no where?