Recently a new girl got transferred to my class.I'm attracted towards her as she is quite a charming personality & beautiful but sometimes I feel that she's also interested in me whereas sometimes I feel she is just taking advantages of me because she's new & I'm good academically.I've never asked her if she has a boyfriend but again sometimes I feel she has one.I cannot directly go and ask her if she has one as if she really has she'll lie to me that she doesn't like most of the shy natured girls.
Due to this I'm not able to concentrate on my studies & so I've become short tempered.
. HELP ME OUT.

If she has a boyfriend she won't lie. You've got an odd thought there. People lie to protect themselves. HAVING a boyfriend IS a protection for a girl, so she won't lie about it typically.

And besides, you can ask in a way that assumes she DOES have one rather than asks. "I'm sure you have a boyfriend already, but if you are ever on the market again, I'd love to take you to a movie or a concert sometime. Let me know."

What do you mean she "takes advantage of you academically"? You're helping her with homework? Nothing wrong with that.

And the possibility that some girl you like but aren't dating and haven't even talked to about it... you're trying blame that situation on short-temperedness with others on THAT? No, I don't think so. Your character is what you do. If you snap at others, then that's who you are. You can stop that anytime you want.

Shyness is cute, in you or in her, but it's a personal PROBLEM. It's not usually of much help in any way and should be overcome at every opportunity. And you don't overcome things by accepting them, you overcome them by acting in spite of them.

Do not let shyness EVER stop you from communicating with people. Face it, push through it. Everyday you succumb to shyness and let it stop you is a lost day.

When she asks you to do her assignment, write in her notebook "I really like you and lately my imagination takes me to Mars so I was wondering if you are available and may consider me to be your BF?"