<human>: Quick background - got out of a 10 year relationship/bad marriage with two little kids. Rekindled with a friend from childhood. He's a great partner, amazing with the kids, there is a lot to love about this guy.

And when I say a lot, I am also struggling because he's extremely overweight/obese. When we started dating I was overweight too after having the kids (right on the edge of normal BMI). When we started dating, I gained 10 lbs because he started buying all sorts of terrible food and we started eating out frequently. This guy is unfortunately VERY overweight and is close to 300 lbs. 

To be fair, he has been this size since we started dating. I still find him attractive but when it comes to the bedroom, I am really struggling. His size literally causes me to sometimes feel like he is crushing me and I cannot breathe beneath him. Anyway, I recently took control of my own fitness and health and have lost 10 lbs to date. Although he promises he will exercise and diet, he continues the same patterns that he always has. His lack of motivation to lose the weight is starting to wear on my attraction even more. I've tried to talk to him about it from a concerned approach (his uncle died when he was young and about the same weight). I'm starting to feel like this could be his weight and his food habits for the rest of his life and it's scaring me.

Has anyone been through this? Any helpful advice?

Can you give me the gist of the text in a nutshell?
<bot>: Bf is obese but continues giving false promises he will diet and exercise. How can I motivate him so we can have a healthier and happier relationships?