'I want my FB friends to stop commenting on my posts'

My Facebook friends routinely comment on everything I wear and say. I have restricted their access to my posts, but they still think it's cool to message me and share their opinions, which I am not interested in. How can I get them to back off?
To be on Facebook or any social media platform is to open yourself up to the world; it comes with the territory. If this bothers you as much as you say it does, you should choose your Facebook friends more carefully or deactivate the account and live in the real world for a while. It's how our parents did it.

We are a close group of friends and I have a feeling three of us are in love with the same girl. We haven't discussed it, because that would be awkward, but I sense it whenever we are together. We have been friends for a long time and I'm worried that any change in these relationships will affect us all as a group. What can I do to prevent it?
To begin with, there is no indication that the girl you refer to is even vaguely interested in any of the male members of the group, so it's a little presumptuous of you to assume she will even want to get into a relationship with any of you. Secondly, there's nothing you or your friends can do to prevent any change if this involves two adults who choose to be together. The best thing to do is focus on why your friendship matters, and allow everything else to take its course. If you have feelings for this girl, why aren't you telling her about it? At the very least, you will find out whether or not she shares those feelings. Behaving like an adult is about taking rejection on the chin and moving on. If you and your friends can pull that off, and make sure your friendship comes first, you will all be fine and your bonds will only get stronger.