Looking for songs about the wonderful feeling of being in love

Cheesy I know, but I'm looking to make a playlist filled with songs that are all about the overwhelming feelings of peace, contentment, and happiness that come from being in a healthy, loving relationship.

I like most genres aside from rap and heavy metal, and would like a mix of upbeat/fun and slower/romantic songs! I already have around 200 songs in my playlist, but looking for more! Indie/lesser known songs would be great too! Thank you!