What message should I send her?

I think your simple words are actually quite warm. Maybe your girlfriend is more demanding. Let me tell you a few:

1. Even if I don't have a grain of rice, there is at least you in my world; Even if I am as rich as paper, my universe still needs you; Even if my mobile phone has only a dime, I will send you the last message! Happy every day!

2. The wind likes the free sky best, and it will bring your wish to the angel, so I cut the string holding the kite, and it begged the angel for me: May you be happy forever when reading the short message! Always beautiful!

3. The Ministry of Public Security issued five bans, forbidding pretending to be busy with work and ignoring me, forbidding going to OK and forgetting me, forbidding calling me when you are in trouble, forbidding eating and not thinking about me when you are free! The requirements must be carried out to the end!

Acquaintance is sometimes an act of god, no matter how deep or shallow the fate is, you and I should cherish it! No matter happy or sad, remember that I am willing to share it with you! No matter how far apart, where you are is the direction of my blessing!

5. How have you been recently? Struggle and miss, all afraid of you hearing, how to hide, madly love you, a gentle heartbeat sleeping alone in the dark, thinking of you, is my eternal language!

6. The world is big, and all my eyes are on you; The world is small, and I only have eyes for you. The world is wonderful, let me know you; The world is too bad for me to hug you. The world is wonderful, seeing you every day; The world is helpless and misses you every day!

There are many such short messages on the Internet. You can search for it yourself. I hope you can use it.