ducky

My advice would be to marry her if you're serious (you said you've been dating 3 years). My girlfriend is about the same height, was on the swim team during high school and about the same weight originally, maybe thinner. While we were dating over a few years she gained up to around 170-180, 190 at one time. When we got married in May of last year she weighed 180 lbs. Since then she's settled into her lifestyle, no longer has to worry about fitting into her wedding dress and such, so she's gained more weight and weighs 215 lbs. It's important that if she isn't into it like you are, you don't make her weight the focus of your relationship, and instead focus on the relationship itself. Lots of good sex and lots of genuine affection will definitely make her comfortable and happy, and those are the things you want to focus on most.