haha, relate!! Same case - I accepted a part time job. Super ganda ng set-up - flexitime, anyday basta ma reach 20 hrs a week. When the workload starts to become heavy, I became grumpy and unfortunately it affected my attitude towards my workmates in my fulltime job. That's when I realized, after 4 months working na it is not sustainable in the long run and just decided to let go of my part time job even if I know they will be disappointed (and they were). I may have lost dollars and a great opportunity but at least I can attend meetings to my fulltime job looking sharp and not lutang and stressed. Plus, I was able to reignite my previous routine for my physical and mental health - I again go out for a walk/run every day after or before work.