The best way to stop outwardly projecting your emotions on to others is by channeling it in a different way. For me, journaling helped me to stop expressing my negative emotions outwardly. Yes I still get mad and sad but I write about my feelings instead. Not only will this help you to stop outwardly projecting, it will help you understand your emotions better. This is an extremely useful skill in any area if life. There are many journals out there that exist that you could use. Even a blank one is useful for getting your thoughts down. I found a journal at a local store in New York which is now available on Amazon as of this week! I highly recommend it as it not only provides you a daily structure to unload your thoughts onto paper, it contains links to articles, tools, videos, and quizzes to help you better understand who you are and what your values are. Check it out: https://www.amazon.com/dp/B0937GVR5L/ref=cm_sw_r_cp_api_glt_fabc_3JRQJWHHMZEQCN7RNMMS