There may be no greater joy than that which comes from fully applying (giving) oneself to something...or someone.
When I am stuck in a (joyless) loop, could it be that I'm not really giving myself to anything? That I'm not taking any risks? That I'm waiting on everyone else to do something? Such cycles are self-encapsulating.
Want joy? Go give yourself to something, besides yourself. ...so what if you get hurt, you're hurting anyway (in your loop), right? You may find a surprise or two...or many (even if it still hurts a little).