Running is good for your health and releases endorphins which makes you happy. I was in the same situation with my ex, 4 year I wasn’t allowed to do nothing. I wasn’t even allowed to watch films over PG rating! Or watch TV on my own. Long story. Had no mates.
It’s hard when its like this you think that there is nothing else out there or better. But there is! You will get what you deserve it just takes time. Just don’t ever go back if he’s controlling you. Just start planning your future now ???????? thanks for that ????