Isn't it better to focus on positive feelings rather than putting attention on the problems?
Although this is a currently popular belief, there is something inherently unreasonable about it. There is a world of difference between feeling genuinely positive about life and adopting a positive persona. In fact, by trying to focus particularly on the 'positive feelings' you are actually expressing the negative belief that you feel you have to focus on only a part of yourself in order to maintain the presentation of positiveness. If you have a genuinely good feeling about life, it will express itself naturally without effort, in everything you do. You will also naturally be just as interested in your uncomfortable feelings because they let you know when there is a problem that needs your attention so that you can take care of it, much the same as physical pain is of interest to a healthy person because they need the information to protect their health. Staying open to all your emotions and the messages they bring is both a vote of confidence in life (positiveness), and a constructive way to protect it.