if u join masters in nepal and complete 1st year, some university consider that as 4 year bachelor. That will be best for you. Under graduate ma aayo bhane believe me, you will not enjoy here. Tell your other friends also aboth this thing. I cannot call it hell but certainly US is not 'heaven' for Undergarduate students if u don't have enough assistance which you can never get in ur case(3 year bachelor).