I'm not really able to stand up for myself yet
Why do you feel like you are having trouble standing up for yourself?
My parents taught me from a very young age that I should always be modest and humble about myself.
Try to get used to standing up for yourself. It would be terrible to feel like you are constantly being taken advantage of.
I can't do that. I don't want to hurt my parents' feelings
Your parents are setting you up for failure, they should have taught you to stand up for yourself. It is something that you need to do so that you do not get walked on by others.