It is not selfish to be happy. It is your highest purpose. Your joy is the greatest contribution you can make to life on the planet. A heart at peace with its owner blesses everyone it touches.
Laughter lifts us over high ridges and lights up dark valleys in a way that makes life so much easier. It is a priceless gem, a gift of release and healing direct from Heaven.
We believe we are hurt when we don't receive love. But that is not what hurts us. Our pain comes when we do not give love. We were born to love. You might say that we are divinely created love machines. We function most powerfully when we are giving love. The world has led us to believe that our wellbeing is dependent on other people loving us. But this is kind of upside down thinking that has caused so many of our problems. The truth is our well being is dependent on our giving love. It is not about what comes back; it is about what goes out!
Pain happens, but suffering is optional. When pain comes, make use of the experience, but do not wallow in it.
When you accidentally place your finger in a flame, it is supposed to hurt just long enough for you to pull it out.
If you think there is value in keeping it there, you will be a crispy critter. Pain is a minor element of life, unless you are indulging it.
Then it becomes suffering. Get the message and then get on with your life, which is far more about joy than sorrow.