In order to avoid the feeling that nobody has come to save you, save yourself from the lonely place you may be in! I guarantee you that it will be ten times more rewarding when you pull yourself out of that dark place rather than sitting around and waiting for someone else to notice.
Once you learn how to pick yourself back up you will be so much stronger than when you were knocked down. You learned how to figure out what was wrong, change it. Then, next time you find yourself knocked down you will have no problem picking yourself back up because you have been there before and know how to save yourself.
Try not to rely on other people because there is no guarantee that they will always be there for you.
Next time you're feeling down, I challenge you to take action and fix your situation. Do something that will make you happy again.
Have you ever had to pick yourself up after being knocked down? It's not easy to do, but it's worth it.