I've been quitting piano forever..., so let me know how it's going and if it worked 
Marik, A kindred spirit!
Rachmaninoff is said to have a bon mot: music is enough for a lifetime, but a lifetime not enough for music.
No matter how skillful, talented or popular you are at the piano, there will be times when you feel that what you do at the piano is inadequate. At times you will feel you can not do it well (no matter how good you are, I promise), sometime you will feel that it is not worth all the time, effort and sacrifice you put into it (no matter how little that is).
But then, sometimes, you will either sit down and play something, or practice an old piece, or read something new, or listen to a record or see a performance, and you get this joy of music (maybe is a sad feeling, maybe a scary one, no matter, it is a strong feeling that overtakes you and fills you). And then, at those times, it is very clear that once you have the piano (and rather: music) as part of your life, the only question is how much time will you devote to it at various points in your life. Maybe it is zero, maybe a little more, but the piano will always be part of who you are.
You can quit the fantasy of an international piano career, of playing concerts with the London Symphony Orchestra and recording the entire piano literature for Deutsche Grammophon. In fact, you can quit that paradigm even if you have done it and could continue to do it (consider Ivo Pogorelich). You can quit playing in public, and then change your mind and perform again (consider Horowitz). You can consider quitting trying to impress people with your piano playing and do something else for your day job (Jorge Bolet served in the military before embarking in a teaching career, all of that well before starting late in life the phenomenal career he had after age 50). You can quit these externals and continue to enjoy music-making at the piano.
Take a break from lessons. Live a little. Perhaps you will find the piano again in the future (or perhaps not, no shame in that; in that case, it will turn out it was a very good use of your time not to practice the piano anymore).
Best wishes.