Writing a Romantic Relationship

Jessica

Here's the jist...

I am 16 and writing a book where that main and side charecters are in a healthy relationship. This is not the main plot, it's not a romance novel. However, I've only had one boyfriend (and not a perfect one by all means), so I don't really know how to write a couple's interactions on a day to day basis. Also, I'm like 98.9957% sure it would be weird to get a bf for research purposes...

Please and thanks!