You might think being alone makes you lonely, but that*s not entirely true. Being surrounded by the wrong people is the loneliest place in the world. Before you diagnose yourself as an unhappy person, first be sure that you are not simply surrounded by negative people constantly trying to bring you down to their level.
A different perspective on scars from masectomy (my mother's experience): My mum had a masectomy more than 10 years ago and now she regrets. Because her scars hardened and causes her pain now and then. She had at first mistaken the pains as heart disease.