Dealing with insecurity and other issues

I am classified as narcissist by my friend. I am a very insecure person when it comes to relationship/friendship. I demand a lot of attention when I am with other person and get angry when the other person doesn't have sole attention on me. I am afraid of losing other person due to my nature- attention-seeking, anger issues, jealousy etc. I want the other person to grow with me. I try to motivate but it doesn't happen. I end up hurting others. I am also a violent/abusive person when angry. When i am in normal mood, i try to make it up for all the things but getting angry always messes up everything. I also get annoyed at trivial things- like when someone is singing near me, when someone interferes in my work or tries to tell me some other way of doing my work, when i am free and the other person is just using social media    (I don't interfere in other's job etc) Would love to work on my issues because i feel guilty of doing all those things but seems like beyond my control.