I think my ex has been emotionally manipulating me
Is their manipulation still affecting you now?
Not anymore, I've recovered and I'm better now.
You should confront them about their manipulation and tell them to stop. If you keep letting them manipulate you then you find find yourself back unhappy with them.
It's their fault.
You need to tell this person how you feel about being manipulated. If you say nothing then it will simply continue to happen and nothing will be solved.