Hey Tatachoo,
I'm sorry to hear that you are experiencing such burnout at your current job. It's never easy when the environment that you once loved being in becomes a place that you struggle to be in.
You should be proud of yourself for recognising your current mental state and the effects that it's having on you.
Have you tried to talk to your manager about reducing your hours permanently? Perhaps this might be a good way to reduce some of the anxiety and burnout that you are currently experiencing as a result of your current work-life schedule. This could be a good way of ensuring that you don't lose your interest, especially if its an environment that you love working with but is momentarily depriving you of finding fulfilment outside of the workplace.
From personal experience, I took days off here and there when I was having my own issues that I had to sort through and whilst it helped relieve some of that pressure and anxiety around having to be at work whilst I was feeling like that, those feelings only came back when I had to go back in. I recognised that my mental health was my number one priority and as much as I loved the job and everyone I worked with, I needed to take a bit of a step back to get myself back in check, recover from my emotional burnout and I returned back to what I once once working but in a better state of mind. At the time, I knew that I wanted to keep working there but I needed to find some fulfilment outside of work too and feel like I had the time to do that.
Years later, when I felt fulfilled in all areas but work, I realised that it was time for a change and that the environment that I once loved wasn't serving me anymore. It took a long time for it to get to that point and a long time for me to recognise that but once it got to that point, I couldn't shake the feeling anymore and it's been the best decision for me.
I understand how comments like being asked to come in when you are really struggling can be so hard to hear. I know they probably mean no harm when making them and don't want you to feel pressured into fulfilling their request but it doesn't stop those feelings from flooding in anyway. It might be helpful to reassure yourself that you are doing what YOU need to feel better and that the burdens of others are not up to YOU to resolve, especially when you don't have the capacity to do so.
I wish you all the best and hope that you can find a resolution with your manager :)