So Tired

I feel so tired. I don't know what to do now. My father died when i was very young. My mother has raised me up since then. She has stayed single until now to raise me. I love my mother and I owe her so much. Since I was an adult and knew the meaning of life, I've been in love with a lovely and pity girl. She's like me. Her father died by illness, just like my father. I know her, she know me. We know each other. She's so pity. I try my best to help her out of her fierce life. Step by step, I become more than a boy friend for her. She said she couldn't live without hearing my voice.But my mother does'nt like to hear that I have a girl friend. She sacrificed her life for me, and she want me to grow up more and more. She doesn't want me to be in love so soon.She want me to study harder and harder. So she prevent me from talking with my girl friend (QA). And then, QA's so up sad. She said, she felt that I didn't love her anymore. And so, we argued. So many times we have argued since my mother said to QA that she didn't want me to be in love so soon.
What must I do now. I really want to build a better life for both my mother and QA. But they don't know my think. What must I do????