The lLast year, my aunt asked me if I could take care of her cat, I did her a favor and she paid me 50 euros for doing this job for 1 week.

“job” is optional

Since that moment, she started to take advantage of me, e. Every time she went to the beach, or on a trip, she called me and ordered me to take care of her cat.

I know that she is part of my family and I should do her a favor if she needs it, but I believe she is using me because of the money she paid me one year ago; s. So this year, I refused her proposals many times because I can´t stand going to her house for nothing and spending there 1 houran hour there every day s. She'’s not in Seville.

Do you think that I'm being selfish?

“that”is optional

TAKING CARE OF MY AUNT'S CATaking care of my aunt's cat

Titles are usually in title case (Taking Care of my Aunt's Cat) for formal cases or sometimes in sentence case (Taking care of my aunt's cat) for casual cases. Putting them entirely in upper case looks like you're trying to force attention on the title, which is considered rude in most cases.

TDuring the last year, my aunt asked me if I could take care of her cat,. I did her a favor and she paid me 50 euros for doing this job for 1 week.

I know that she is part of my family and I should do her a favor if she need it, but I believe she is using me because of the money she paid me one year ago; so this year, I refused her proposals many times because I can´t stand going to her house for nothing and spending there 1 houran hour there every day she's not in Seville.

"every day" = on every single day
"everyday" = routine/normalised