Why so controlling?

I've come to realize that my SO is rather controlling of me emotionally: he makes it seem like I need his help to do certain things, he's become particular about my social media and cell phone habits, he mentions how much negative influence or control a friend of mine or mother has over my life, he's become insensitive to my emotional needs, etc. He hadn't always been like this. Before calling it quits, do you think there is a way to communicate this to him without him getting upset that I'm accusing him of being manipulative? Is there an underlying reason as to why he's started to act this way?