My girlfriend's family is against us, and the fortune teller says snakes and horses don't match. Now my girlfriend is also influenced by her family and says she doesn't know what to do. ...

There is no such thing as numerology. If love is defeated by such a statement, it can only be said that your feelings can't stand the blow. You can receive different versions online, and each version tells a different story. Love can't be measured together or not! You should impress her with your heart and let her have no scruples in this respect!