My boyfriend suggested I lose 10kg as he says I'll look better, but should I do it just cause he wants me to?

We have been dating 7 months and last year I lost 25 kg. But I am still about 5 kg overweight and I live a healthy life style, walking 8 km a day and go to the gym 5 days aweek. I eat healthy and have managed to maintain my weight. He says he finds me attractive now but I would look better if I lost a little bit more. It just frustrated me that he wants me to lose weight as I was proud how far I had come and it just feels like I am as fat as I use to be. Also he is overweight too, has a unhealthy diet and doesn't exercise and I haven't ever complained about his weight. What should I do?