I used to be a lot more active and lately have slacked off. Have actually gone through this same scenario a few times in my life to date. So I GET the whole thing about wanting to/not wanting to. :smack:
I used to cycle like 60 or more miles a week…for 5 YEARS I did that, and I was so damn fit…
I used to do yoga daily…ditto.
I am currently trying to psych myself up for such activity again…I KNOW I would feel better, drop the excess weight I’ve put on, benefit my health, but it is SO hard to just DO IT! :eek:
But that, ime, is what I have to do…just do it (no I am not promoting Nike…I used to work for Adidas, and that would be just…traitorous :D) I just have to do what I did before…get my ass out there/up and DO it, whether I want to or not. :mad:
(I rode my bike everywhere because I HAD to to get to work and back and to the store…I don’t HAVE to now, but I have to pretend I do and make myself do it anyway…a lot harder for me)
Because I KNOW that once I have done it grudgingly for a while (not long, either, just a few weeks or months) I will WANT to do it. I just won’t feel right when I don’t and will look forward to how great I feel, mentally and physically, when I do.
I used to turn down rides so I could ride my bike.
I recently tried a gym…HATED it! Not only working out on machines as opposed to “real life” activities, but with all these people I didn’t know or want to look at/have looking at me. Ick. With a friend/frineds is great, but not in a huge room full of strangers. JMHO.
So that…set your mind on it and force yourself for a while…every damn day. Before long, it will become second nature.
AND yes, find activities you enjoy for their own sake, not as “exercise”…like the dancing you mention (I love that as well…my late DH never would do it)
I like to take long walks and look at houses or just whatever.
And swim…we have a pool and I took my daughter and a few friends out for 2 hrs today and had a blast.
I also have a mini-tramp which is fun as hell to jump on, esp. to some good music.
Or I dance to music…sometimes while cleaning house. 
Planning on forcing myself to take a 5 mile bike ride every morning this summer (since I’m off and have the time)…just need to map out my routes.
But my best advise, which I am working on taking myself, is to just pick something and build it into your daily routine and don’t let yourself miss it. Soon, you won’t want to miss it. The body/brain is a monkey, and easily trained. 