how how how?

now was thinking to change a hairstyle.
short hair or long hair nicer?
bebe doesn't wants me to cut.
but i like my short hair when after i graduate.
but abit grudge.
in long hair...
people thought im 23,24years old woman.
that's really sad.
im only 20 this year.
oppositely my mom and sis said i look good in short hair.
wat to do wat to do?
comment pls ~