Please help me. I'm with my girlfriend, and her mother doesn't agree. I want to send a message to her mother, but I don't know how to write it.

Write something simple and clear. Why doesn't her mother agree with you? Start there. For example, she is worried that you can't give her daughter happiness. Then sincerely tell him your current goal and the direction of your efforts, ask her to trust you or give you a deadline to get along for a while, and then you can prove yourself by actions ~ ~ If it's because of your age or other things, you can tell her according to the actual situation ~