I never experience this before as my parents normally leave the decision to me.
But if this really happens, i'll still stick to my bf, cos i feel that its my happiness. But of course i will try my best not to have any conflict with my parents and try to make them accept him.

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The greatest regrets in our lives are the risks we did not take. If you
think something will make you happy, go for it. Remember that we pass this way only once.
Bottomline :
Time don't wait. If you think you might have found the right one, treasure him/her. Don't let he/she go away. Don't let fear hold you back.
Give it a try else you might regret later... No one other than yourself
knows what can truly make you happy.