1) Studying abroad seems difficult but interesting to many students.
CHALLENGING
Students understand how challenging it is.(to study abroad)
2) Studying abroad is similar to studying at one's home college.
DIFFERENT
Studying abroad is not different from studying at home.
3) When you are abroad you can miss your relatives very much/
DEPRESSED
While abroad you feel (are) depressed because you can't see parents and relatives.
4) You are in charge of all your things.
RESPONSIBLE
You are responsible for everything.
5) You can learn a lot about yourself and the world while studying abroad.
BEST
Studying abroad is the best experience you can have
