My now ex-fiance played me worse than anyone with little things for months.
She wanted dogs so we got dogs - I love dogs, so I had no problem with her request as long as she did her share to take care of them. First it was her feeling extra tired in the morning a little more frequently than normal, so I'd be strapped with walking two dogs in the morning. Then she would get frustrated over things, not talk to me about them, and lock herself in the living room to watch TV and thrust me into the rest of the apartment with the dogs because "she needed to unwind." Oh, but it gets worse. She would call out my name while I was reading or doing work and ask me to walk the little puppy. Every time she would start one of these new "habits" she would be feeling under the weather so I would do it out of respect. Then she would just expect me to do it.
I confronted her about all this once she started pulling it when she wasn't actually sick or tired and she'd storm out of the room and leave me to... well, take care of the dogs.
She did not put two and two together that I was unhappy and willing to leave until the week I left, and by then it was too late. The small thing that makes me smile about the day I left? She was sick with the flu, came home from work and expected to curl up and relax, and instead I left her with the dogs and no escape from taking care of them in between sessions of puking her guts out.