Can't you just do things together that involve exercise?
Bike Ride's, Walks, Swimming?
my Ex was a size 16, and as such I tried to get her to go on Bike ride's, go swimming etc. she was having none of it (though she did want to swim now and again, I was more on the lines of every week).
Ended it after mutually thinking the same thing. Just shows she wasn't right for me.
Up to you how you handle it though.
Bike Ride's, Walks, Swimming?
my Ex was a size 16, and as such I tried to get her to go on Bike ride's, go swimming etc. she was having none of it (though she did want to swim now and again, I was more on the lines of every week).
Ended it after mutually thinking the same thing. Just shows she wasn't right for me.
Up to you how you handle it though.

), tell her that she'll have to walk it and that it can't be let off the lead because it will run away and she'll have to run around the park with it because they need a lot of exercise... job done.