I don't reply to my girlfriend's text messages or send QQ.

When you say everything's fine, you mean you haven't had a fight before or anything?

Since there is no problem here, you should put yourself in her shoes and think about whether there is anything unsatisfactory in her life or work there. Give her 1 day. If I ignore you for three days, texting means you are worried and you love her.

If she's not interested in you, You should also be mentally prepared. But as a man, you have to do what you should do and what you should bear.