Some times girls like to play hide with boys. She love and need him but she doesn't want to show to him, sometimes she shows like hate him a lot, but after he leaves her, she becomes depressed and haunts him all his life. That's almost happened for girls.
But whatever, as boy/man you have to get certainty of your relationship. Tell her that you love her, and see the reaction. If she doesn't show that she loves you, then leave her. It's not your false to leave her.
Don't waste your time with uncertainty.