Burned out, losing motivation to care about kids I love

I've been teaching for 8 years grade 3-5, and I have struggled the last two years where I am just burned out. I've never felt this way and it feels like my enthusiasm and passion for teaching has run out. I still love the kids, I love seeing them grow and develop. I love watching new students grow throughout the year. I love being able to help, inspire, and help them through struggles. I love seeing kids grasp new ideas they have never understood before. I love seeing the look on a student's face when they can read something new, or solve a problem they have been unable to solve. I love seeing kids learn to be kind, to work together, and encourage one another.<br><br>I've always loved giving extra help after school, tutoring, working with students on new projects. But the past two years I've been struggling to want to do that. It feels like no matter how hard I work, I can never help every kid catch up, and it never feels like it would ever get better. I feel like I am constantly stressed, and that I can never take a breath. I got a new principal this year, and it is not helping at all. I feel like I am constantly being observed, and getting feedback that is not helpful. I feel like I am not trusted, and that I am not trusted to do my job. I feel like I am just a cog in a big machine - it does not matter how hard I work, the outcome will always be the same.<br><br>I feel like I am just going through the motions sometimes. I'm just trying to make it to the next something (break, week, month, etc.) as the best I can. I'm feeling so burnt out, and I don't know what to do. I feel like I'm failing even though I've been told I'm doing a good job. I feel like I am failing my students, and I feel like I couldn't actually teach. I feel like I am constantly dealing with discipline - I've never had this problem before. I've never had to deal with so many issues before this year.<br><br>I don't know what to do, and I don't know if my feelings will ever change. I still want to help kids, but it feels like I have lost the want to put in so much time and effort.