90 percent of negativity that we experience we bring into our own life. Sometimes it is because of our own negative attitude and thoughts, but it doesn't have to be. There could be many sources of negativity that you allow to be around you. Your friends, the music you listen too, the shows you watch on TV and many, many more. Of course, it is impossible for anyone to say with any degree of certainty what is causing the negativity in your life without actually being there and observing your life. These are the things that I recommend people check first when they ask me this question.
After that, I would look into getting rid of the negativity in your life through ritual, smudging, or however you feel drawn to. There are many ways. Above all, focus on positive energy in your life. Make it a priority. Focusing on the positive is the best way to banish the negative. If you are full of positive energy, there is no room for negativity.