As a self-centred person, I get so worried (6)
I believe the answer is:
egoist
'as a self-centred person' is the definition.
I can't tell whether this defines the answer.
'i get so worried' is the wordplay.
'worried' indicates anagramming the letters (worry can mean to interfere with or disturb).
'i'+'get'+'so'='igetso'
'igetso' anagrammed gives 'EGOIST'.
Can you help me to learn more?
(Other definitions for egoist that I've seen before include "Person with very a good opinion of himself" , "It goes around with conceited fellow" , "ill with him to think of others" , "He puts himself first" , "Excessively conceited person" .)