I love my boyfriend so much, he is bengoli and I am simple brahman. He love me so much but now he started to ignore me. I can not forget him.

Forget him. He's ignoring you, so it's safe to say he is not your boyfriend anymore. Move on.

You ignore him back... guy that ignores you has no respect for you. Leave him and move on, and you CAN forget him... you just need to let time do is job.

His love is false, forget him, and in time you will.

But it's not easy for me because he is my first crush and love. But thanks for guide me...

Just because he is the first doesn't mean he is the last, or the only. You must still maintain your dignity and self respect regardless of the intense feelings of love, or attraction. No its not easy to let go of something you want badly. But cannot have.

Is it possible he isn't ignoring you, but simply has to way of contacting you?

Should I give him some space? Because he feel
Due to him I am not paying concentrate on my study,, he is in Indian Air Force and I am an engineering student...

Makes no sense to be distracted from the important things you must do. No matter how you feel. Focus.

Show him if he don't want you once, you don't want him 1000 times...