The fact of the matter is that when there are feelings involved and you like someone, it doesn't matter if you're an actor, a teacher, a doctor, a lawyer, a receptionist - you can't really help it when you have feelings for someone.
I train for about an hour five days a week and feel I'm in the best shape I've ever been. I can eat what I want and that includes scoffing half a big bar of Cadbury's a day.