Why does the speaker feel upset? Because his mother always interferes with his life although he is ______ old.

I don’t know what to do about my mother. She is always criticizing me — the way I dress, the way I speak or look. I can’t even read a book without her interrupting me to ask what it’s about and tell me whether I should be reading it or not, and why. And of course every moment of my time away from her has to be accounted for. I try to tell her to stop interfering with my life, but it doesn’t seem to help. And I’ve no one to advise me, my father is dead and I have no brothers or sisters. It’s not as if my mother has any worries; we’re fairly well off and she doesn’t have to work, only do the housekeeping. Now I’ve met a wonderful girl whom I want to see a lot, but I’m afraid to bring her to the house — when she meets my mother she won’t want to see me any more. I’m nineteen years old, and I’m anxious to be independent.
Q11. Why does the speaker feel upset?