This one is so easy. It is your decision. Negativity is the main cause of all bad thing surrounding you. We all saw the documentary about law of attraction and it is yesterday news, but a lot of it is true. Think positive and your life will be like that. Test people around you. Not literally but pay attention on who is happy and who is not. Then pick one from both sides and speak with them. You will see the differences in everything. From opinion on life to music they listen and TV shows they watch.