Haven't done this in a while and boyfriend wants in

I've been wanting to get back into the swing of juice fasting and MC, but it's been hard since I moved in with my boyfriend because he's not the type to pass on food if he is hungry.
For the past year, I've even gained weight and I think I've put a good amount on him by cooking so much for him.
He wants a way to lose weight and I know the Master-Cleanse isn't good for first-time fasters, nor is it a weight-loss diet. I also know he won't do the Salt water flush. I'm looking forward to doing it again though, especially if I can get him in on it, so we can support eachother. Does anyone have any advice?
Maybe a substitute for the Flush?

I moved 9 hours away from home and left my Master-Cleanse book with my father so I finally came back here to see if I can get back into the swing of things and remember all I once knew haha so now intead of giving advice, I'm asking for it! Help