I mean...when I write about love, I usually just go with what I know and what I've seen.
Growing up, I've see all types of love -- family love, platonic love between friends, romance, crushes. I've experienced all of them except falling in love with someone romantically (I've had crushes, but they weren't on that level). I still feel that the love I have experienced has given me a lot of wiggling room to write for it.
Currently, I'm creating my comic "Our Universe", and I see a lot of the love I've experienced within that. My two protagonists love each other deeply, but there's more to it than just romance. The ladies love each other as friends as well. They're equals but they're also their own persons. I feel I kinda pull some of their aspects from the love I've seen between my aunt and uncle. Just being in each other's presence, enjoying each other's company, laughing and smiling and crying with each other. Being vulnerable and knowing you're in good hands with each other. Things like that.
But lo key, it's also like Beta says -- true love, romantic or otherwise, comes with the silly things, like laughing at someone's corny jokes or groaning amused when they let one loose. I kinda prefer true love to be silly than serious and poetic all the time. Like, it's nice, but I also just wanna see two people chill in stupid x-mas pjs and watch cheesy horror B-movies together.