Equate happiness with love. Equate unhappiness with lack of love. Allow love to stream from your heart minute by minute and allow love to stream in from wherever it comes minute by minute, and, yes, you are happy.
You do not want to be beside yourself on Earth. Beside yourself, you are distraught. You want to be beyond your small self. Yes, get beyond whatever limits you have set for yourself. You can go way beyond yourself into the farther reaches of the Universe.
You may find yourself yearning for parts of your life’s past. Alternately, there are other parts of your life that you would undo from the face of the Earth if you could. Sure, you would keep the nice and exclude the hurtful, yet, in terms of life on Earth, who would you be then?