Hi shazmin
SO it sounds like we are in a very similar situtation....... I am also 16 and south asian and have very similar parents based on what you said about them. I'm lucky I don't have to wear a niqab or anything either, but I still have to dress modestly. I've also always been liberal and never held religion to be very important to me.
My plan is to just do as my parents say until I move out in a couple years, then live my life how I want once I move away even though I'll still have to pretend to be Muslim when I come home for the summer, but faking it for a while is worth the financial stability, since they will be paying for me to go to college. I plan to become financially independent as soon as possible and only then will I come out and say I am not muslim.
Please don't do anything rash, it's better to keep quiet and play along for a bit until you move out, trust me it's NOT worth it to do anything about it now since you have a real risk of being financially cut off, kicked out, or even receiving death threats.
Feel free to PM me anytime!