I talk to my sister most mornings, so while we were talking I played around with my crochet hook and some 28 gauge steel wire. This is wire you can find in the hardware store.
I first attempted some wire crochet with 28 gauge craft store wire but it wasn't strong enough. As soon as it broke I moved onto the hardware steel and never had a problem.
The heart is in single crochet. Chain 3 with 2 stitches back and forth. Sew ends together at the top while it lays flat forming a circle. To make the heart shape I sewed some of the top stitches from across both sides of the seam to force them together. The bottom was forced into the point. Use a pair of flat nosed pliers to flatten the entire piece.