On my way home, I met my friend on train. I was curious to know where she was heading to, so I asked her
Where are you going to
I am not sure if it is correct to omit the preposition, to, by simply asking this instead
Where are you going
Please help me. I am suddenly confused with it.
Thank you.
Yes, that is perfectly fine if you just leave it out.
Both of the phrases are correct although the first is usually used when you know someone is going to a place and the second when you don't know if they are going to an actual place.
Example: Your friend mentions they are going out shopping, you ask "Where are you going to?".
Example 2: Your friend mentions they are just going out, you ask "Where are you going?"
This was the subject of a riddle in the game King's Quest VI. "Where are you going" is a dangling participle, the correct phrase is "Where are you going to?"
That being said, Joyce Carol Oates, the famous short story writer, has a short story with the title "Where are you going, where have you been?"
If you are asking yourself questions about English at this level, you probably have a pretty firm grasp of the language.
Also may read about split infinitives and itinerant/dependent clauses, may help with a bookworm one day.
