My girlfriend is talking me for granted from last many weeks . For her whatever I do seems like normal. In last 20. Hours. I have travel 1000 km by sleeping 4 hrs just to get her work done because she was busy in another work . She did not even said thanks or she did not even asked if I am okie or safely back .

There are more things that make me thinking she is taking me for granted like giving always friends priority , having excuses .

I want to know what should I do and how should I make her feel she is doing wrong ?

Leave her ALONE! Cut all contact! Mission accomplished, without spinning your wheels.

Agree. You can't let people use you and this is no way to build a meaningful relationship. She treats you this way because you allow it. Move on to better things and better people. And note in the future, these behaviors typically never improve over time.