Please tell me if it is normal that i can turn off my emotions?

Interesting skill: If you're always in control of this, maybe it's a useful skill at times -- but it's also useful to be able to tolerate your emotions while you're experiencing them. Your emotions can provide useful information, and cutting them off deprives you of this. For the best answer to your question, please consider consulting a mental health professional who can assess what you're talking about, in person.