Write less compliments, because writing too much will appear frivolous.
Write more about your feelings, with gentle words, not too much, it will be too disgusting. You can ask a girlfriend to take a look at it for you and see if it is acceptable.
You can write about how you feel when you get along with her, or how you feel when you meet her somewhere.
Don't be too gaudy, be firm. Unreality is accompanied by hypocrisy.
Don't copy other people's love letters If you like, you can copy some classic sentences of writers or poems of poets to express your feelings. Of course, you should indicate the source, improve your own connotation, and don't let people see through that you regard other people's sentences as your own words. ..
Keke ...
If you still don't understand the above points, please call me.