Have you tried to exercise without actually exercising? Ok, now I guess you want me to explain that.
When I was working and going to class at night, I had no time at all to exercise...except lunch. But taking my lunch to go exercise rather than actually eating was hard to do. So instead, I took my lunch to go shopping...the long way around. I got in a good brisk walk around town and back down the other street to get to the store back next to the office where I started from. Then I'd spend 10 minutes browsing the store. I'd eat lunch while working afterwards. I also found reasons to get up at work often. Rather than pick up the phone and intercom to ask someone something, I'd get up and go to them, especially if they were downstairs. And at night, rather than sitting down to a movie, I stood up, and marched or used my FIRM step stool with hand weights. Spend at least half a movie doing that and you get a good workout, but you're engrossed in the movie and the exercise isn't as noticeable as being exercise.