I will write about romance when I learn to understand the concept.
Like "what is love?"
You don't always need that for a romance stories.
Like "Violet Evergarden" for example.
It's not about what love, it's about discovering what is love.
If you want to write romance story, just write it and you will progressingly learn with your character.
You can add drama, comedy, or even action to balance the story when you feel stuck with only romance.
Like, this guy try to confess to this beautiful girl and sadly got turned down.
But, later that day he discover that the girl is actually part of underground crime syndicate. And her family behind the scenes run the entire city.
His involvement with this world would only means suffering for him. Because he is weak, clumsy, fool.
But at the end of the story.
Because he is weak, clumsy, fool, he got the girl. Girls even perhaps. I don't know political marriage for power is something common right?
Yeah something like that where the romance is exist but only as backdrop.
Romance irl is often suck or boring so you need to exaggerate. Make it as sweet as possible or make something to help the story not to fall apart.
Or just write story about how to move on from break up. That still counts as romance i believe.
Imagine if you dated your best friend but, the things just not working and both of you decide to break up.
You cloud write it from multiple pov.
And explore what changes, who will help male and female lead move on, how this affects their previous status as best friend.
Yeah like that. Anyway good luck.