Do not retreat into your cave when things do not go as you wish. There is a difference between going within and sitting in the silence and going within a physical hiding place and sitting in solitariness.
It is far better when suffering to be with other souls. Do not wait for them to make you feel better, but radiate love outward, even if you can only muster a small glimmer. Serve. Serve others, for in so doing you are connecting at the soul level, and this will bring about far more healing far more rapidly than sitting alone and licking your wounds. The latter only brings about more misery as you focus solely on the self.
Place your focus on others. Through these vital connections you will experience humanity and realize that others suffer as well. Others rejoice as well. They are there to remind you that life is full of ups and downs and life does go on. So go on. Come out of your cave and live. In so doing, you allow your love to flow instead of stagnating. This flow brings vitality, and with renewed vitality you get back into the flow of life.