Lack Of Sexual Attraction in My Relationship

I have been dating this lady for a year now but our sex life has gone from bad to worse. Initially we were having sex about once a week, now we are having sex maybe once a month or less. I have always been the one initiating sex, she has never done so. Now I am tired of initiating or not even interested anymore. She has also gotten fatter, which is making me lose attraction coupled with the lack of initiation on her end. We still function optimally as a couple in every other regard but romance and sex is almost zero right now. I don’t see her lack of interest in sex getting better after marriage, so I’m having serious thoughts about us. I think I might have fallen out of love with her at this point or maybe I’m overthinking this situation. What do you guys think? Please keep your religious beliefs to yourselves.

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