TRAIN your mind to see the good in every situation. It won't come naturally, you WILL have to work at it, but eventually it will become second nature and you will have joy in your life even when things aren't going your way.
being angry, sad, and overthinking isn't working. flipping out on people isn't working. do something different. be happy, chill, good vibes, take time when you need to take time. see how things change.