Weight loss and perseverance

I am 6 foot I used to weigh about 178-180 but the wife wanted me " heavier"! So I weigh in at 190. WTF with this woman!???? It all goes to this 71 yr olds belly! 35 in. wiaist. I am plenty active but it is hard to get up and down, and dropping 10 lbs surely would help (maybe). I love the occasional cookie, small dab of ice cream 4 times week, but.......
Was at doc last week, my weight does not vary 1 /2 lb over the last 2 1/2 yrs!!!! weird.