As a short background, I remember being a very cheerful kid who was always optimistic, looking at the good in people, etc. However, my parents are pretty negative, skeptical, cynical and bitter people who always had something negative to say about other people. The atmosphere in my house is constantly filled with negativity, and I strongly believe this is what caused me to be the bitter person I am today. I know that being bitter all the time is the wrong way to live life, and I understand that I need to change ASAP, as my bitterness has caused me to turn down many opportunities with friends, girls, etc. However, the bitterness seems so set in stone in my life that I'm struggling to overcome this. What worked for you to stop being a bitter and resentful person? Thanks.