Question

how should i decide what should i become i like science so much especially physcis....?????

Answer 1

u can go for mechanical engieering, aeronautical engineering or etc bt in case of physics engineering is most preferable.

Answer 2

There are a lot of carrier options, since you like physics a lot you can:- 
a) become a phy teacher (obvio)
b) work in the department to astro-physics
c) become a scientist 
d) work in research and development in the field of phy in an university 

Out of this i fell that working in the department tpp astro-physics is the most interesting, but only go for it if you have interest in phy and space. If interested you can work in NASA or even ISRO or IICE