For no reason at all
The best occasion, because nobody sees it coming.
Love song
How you met, what you argue about, what she does when things are bad. That becomes a song.
This is how it sounds
The names in it are made up — so is the story. The song is not: it was made exactly the way yours would be.
What for
The best occasion, because nobody sees it coming.
When you don't know how to begin.
Some things are easier to say when somebody sings them.
Not an apology, but a start.
How it is made
Who it is for, how the two of you stand with each other, what happened. Five to ten minutes, guided — you do not have to be able to put it into words.
You see once more what you are ordering and what it costs. Only that click sets anything in motion.
Lyrics, music and cover art are made. Measured, that takes two to four minutes.
Several versions to listen to and download. If none is right, we make it once more.
Questions
Then don't write about feelings, write about things. Which film is always on at your place? Who gets up earlier? Concrete small things make a better song than big words.
Only if you want it to. In the "what should never come up" field you can rule out sentimentality outright — then you get something quieter.
The music is made by a computer, the story comes from you. And that is exactly what you hear: nobody else knows that the two of you met at a bus stop.
Other occasions