Developing a thick skin and not feeling like every request is a life-or-death situation - this is what you need to have. You have to take the input and make adjustments as necessary, but continue to steer the project toward your vision. You also should decide how much time you will devote to the project and then not go over to avoid burnout or interfering with your life/work.

My most popular product at the moment has maybe 150k installs and I could spend the rest of my life trying to appease every request. I can only imagine a massively successful software project must be a deluge of requests.