My mother calculated my marriage today, saying that my girlfriend and I were married in disguise, and the woman would change her mind, but we have been together for six years. ...

If it is true love! You must be firm! Don't believe anything else! If you believe her, you should try to continue with her! If you believe this gossip, if it is a lie, it will ruin the happiness of your life! This kind of gossip doesn't exist until you see your girlfriend change her mind! Even if it really changed in the future, at least you were happy!