Not Feeling Achievements

Hello.
So I have depersonalization and I was wondering if this is related or if it's something else.
To illustrate my situation using a strong example, and this applies to a lot of other things in general, I donated part of my liver to my mother and saved her life 5 years ago. She had six months to live. I really never felt it as an accomplishment, until now when I was reflecting on things. I told myself 'you gave up part of your liver to your mom and saved her life' and i got this very overwhelming rush of emotions right after. But again, it's temporary. That's the way it is with everything. I am what people would consider a very good person who helps others. I am excelling in my career. I have accomplished a lot at such young age and I have very ambitious goals for myself and others in the future. Why do I not feel any of my accomplishments and, by default and not necessarily with an ego, have it affect my personality positive by maybe confidence in general? Is it the depersonalization?