To make your teabags, you will need coffee filters, I used unbleached flat filters (any size) and cut out hearts. I stitched the two sides together with regular thread and carefully loaded in about a 1/2 teaspoon of my loose tea leaves into the middle before stitching the whole bag shut. I also added my own labels, merely attached with twine and wrote on the back of scrapbook paper.
Here is the original source with great step by step directions: http://home-shoppe.squarespace.com/blog/2013/1/27/youre-my-cup-of-tea-diy-heart-shaped-tea-bags
Happy heart teabag day!