Who am I?
Ya again don't worry so much about labeling yourself. In my opinion a HSP is just an empath waiting to become fully aware. Blocked by something that is not allowing them their full sense of abilities.
I don't feel you are a narcissist. I think you just have some understandable situations causing you to be unbalanced, doubts, and insecurities. We are also chameleons, which if we use it knowingly can help us blend into groups and crowds well. But if we don't monitor it we can pick up mannerisms and traits of others. One of the things about the narcissist empath relationship is the narcissist will gather empaths and press them into doing their dirty work and feed the narcissist's ego. This happens a lot in teens and young adults. A narcissist will become the leader of a group and gather people he/she can push their emotions on. You spoke of being picked on then you became more passive aggressive. This could have been a combination of conforming to the emotions you felt others express and your ego starting to try and edge in your own self importance.
I'm telling you man. Meditate. Look up several youtube meditations and find one that works for you. I tend to do the chakra clearing, grounding, and ones pertaining to spirit guides for guided meditation. Celtic, classical, and mostly instrumental music is what I use for personal reflection and general meditation back ground.
A question about the people around you, or even the relationship you just left. Is it possible that one of the people you are connected with is draining you? Energy vamps are a real thing, but so is depression. Either can cause some of the symptoms you have described. Cord cutting can help reduce if there is an energy vamp, but only a professional can help if you have your own depression.
I'm nearly 40 now, and have known I was an empath since I was in my early teens. I've developed some of my own techniques to help me with sense of self and determining what emotions are my own, and what I've picked up throughout the day. At the end of the day, after my kids and wife have went to bed, I sit and sort things out. Sometimes I'm on the computer, sometimes playing video games, reading a book, meditating, or maybe just watching TV. The important thing is I'm alone, and the people nearest to me have settled into "sleep mode" with their emotions. During this time I think about each emotion I am holding onto. In my mind's eye I pull it out and look at it. I ask myself "is this my emotion? Do I have a reason to feel this way?" If not then it belongs to somebody else. Sometimes just saying it is not mine is enough for it to be resolved. Sometimes I have to place it with the person it belongs before I can let go of it. Yet other times I have to make a decision of if there is anything I can do to help that person so they can move past, before I can move past it. If it is my emotion then I have to decide if it is one I want to keep, or how I can work past it on my own.
I am working on a poem that would be fitting to this conversation, and I believe what your feelings are. Since it is not quite done though maybe this one will do.
This little light of mine, I’m gonna let it shine, let it shine….
Something so simple yet profound.
In the darkness I am found.
I used to feel that I had no choice
That nobody would listen to my voice
Protect and shield was my way
Hiding from the pain of day
Quite certain this was my plight
To go about life with no sight
Fear and Anger lead my life
Causing not but only strife
Thinking I was alone and lost
One day I finally paid the cost
It was in me burning bright
Trapped there was my light
Knowing now that I am one
I feel it burning like the sun
I was meant to share it wide
Not push it deep down inside
We just have to give up the fight
Courage and love feeds our might
If you listen you too can hear
He will help you lose the fear
I am you and you are me
Together now we can see
Balance and faith we must gain
Then we can release the pain
We are here to be bold
Embrace each other in the cold