If their Instagram accounts are any indication, Michael Clifford and Crystal Leigh are the pinnacle of relationship goals. Michael, the guitarist for 5 Seconds of Summer, and talent manager Crystal have been together since 2015. In 2019, they shared their engagement on Instagram via photos of their romantic, sunset beach proposal. Once I saw those photos, I ended up in a never-ending scroll of the couple's Instagram accounts, which are packed with some of the cutest couple photos ever. While I'm sure there are plenty more photos of the pair to come (especially with a wedding thrown in the mix), here's what they've already posted that makes our hearts absolutely melt.