You can incorporate hearts even if you already have a theme for your engagement session. I'm loving this retro style e- session by Crystal Clear Imager.
One of my all times favorite images: You {plus} Me {equals} Love. Via Grosgrain Fabulous
More fabulous chalk ideas. A big heart that you can jump into (image source), and the very famous blowing kisses (photo 1, photo 2)
A heart made out of metal… cute and meaningful. Image via Kiss the Groom
A paper heart garland makes a great DIY project that will give your e-session a touch of extra love. Do red hearts for a pop of color, or shades of pastels for a vintage feeling.
Or just hold a heart together. Image 1, Image 2
Don't forget to stop by and check Part 1 and Part 3 of I {heart} this Engagement Session Ideas.