Tell people you're feeling burned out and want a break. If no one else steps in to DM, continue the get-togethers with boardgames or whatever.
I think most DMs feel unappreciated a lot of the time. It's easy for the players to assume that the DM sees them having a good time and knows they appreciate it, not realizing that a DM is so busy tracking all the in-game action that he's barely aware of the players as people. Also, even one player who is quiet, or who pushes a lot for this or that nonstandard feat, weird ruling, or cool piece of equipment, or indulges in routine whining about silly stuff that doesn't really bother anybody, can give the DM an exagerrated idea of player dissatisfaction.
Perhaps somebody need to write up the "five DM languages of player appreciation," so people can assess what they need to do to make their DM feel appreciated. (The "five languages of love" in pop psychology are verbal affirmation, physical touch, acts of service, gifts, and quality time, most of which still work in this context. DMs are giving quality time and acts of service by the act of holding games; bringing food/drink and telling the DM that you had fun are accepted methods of keeping them happy; but I'm pretty sure lining up to hug one after every game would backfire in most groups.)