@Charbella My goal is not to offend you but I want to say how it is. After all I used the topic to vent about my struggles with friends and family who have (severe and unmedicated) ADHD. I might have a very mild case of ADHD myself, at least I have an uncertain suspected diagnosis and it runs in the family.
What I describe is behaviour caused by ADHD. The symptoms are pretty clear and there is no need to argue about the fact that these symptoms can easily lead to self centered behaviour. Do I say that everyone with ADHD is self-centerd and difficult to deal with? Absolutely not! However I don't take part in romanticising and downplaying a very serious disorder. I see how unmedicated people struggle in their life because the parents ignored a diagnosis in childhood or because they never went to a doctor.
One ADHD symptom can be emotional dysregulation, it is like walking on eggshells, especially if you need to criticise them for even minor things. Impulsvitity. Troubles planning leads to constant stress. Talking over you and not listening.
There can also be a lack of self awareness. This leads to behavior that appears to be narcissistic but in the end it is caused by ADHD, which makes a difference in how to deal with it.
If I would take all of that personally I would think they don't give a shit about me and I don't matter to them. After a close friend got a diagnosis many years ago I started to get more knowledge about ADHD and I began to understand that this is unrelated to me. It still can be difficult but if I'm able to untangle myself I will be able to focus on the positive aspects of being close to them again.
The person that is most important in my life has a ADHD diagnosis and that person is not egoistic but I see when she struggles with ADHD, without medication she takes everything even neutral to be against her, a behavior that some describe as rejection sensitive dysphoria (RSD), which is common in people with ADHD.
Even "just" depression can be difficult to deal with for people that are close, and even depression can lead to self-centered behaviour. Same with PTSD, autism etc. ADHD is no exception.
So, I still want to thank you for taking your time and sharing your experience despite being offended by what I wrote.
I think it is similiar for me, they don't intentionally exploit me but I'm there, like a tool and it gets used. It will not stop if I expect them to change their behaviour, I need to change. I really wish I had a therapist to support me with that, but the responses here already helped to accelerate my determination to work on it and set better boundaries.