Start with identifying your problem areas. Paying attention to your interactions with other people and to your self-talk is a good launching point, as is asking your friends and partner what bothers them about your behavior. Try to really listen, without being judgmental and defensive. You will be amazed at how good, strong and happy you will feel. According to this test, your communication skills are not bad, but could still use some work.
Communication is the essence of social interaction.
It influences what others think about you and how well they understand you. It also determines to a large degree your self-esteem, assertiveness, and social adjustment. You are doing relatively well, but things could still be better. The good news is that with a little work, communication skills can be considerably improved. It's well worth the effort.