I think the key is to be strong enough, and brave enough, to voluntarily bring about change. Every time you disconnect, you get a little happier. And I bet coming back feels good too. To let go of a state of mind is scary, seems risky, and undesirable. But a mind, like the body, needs a varied diet of states to be healthy. It's make it more flexible, agreeable to change, tolerant to adversity, and therefore bring about contentedness and happiness.

So I think that your plan to gradually disconnect is something good. I wish you best of luck with it.