Start with a styrofoam ring, I bought mine an Hobby Lobby with a 40% off coupon that you can get on their website. They have all of their Valentine's merchandise on sale too, so I purchased all of my supplies there.
I also bought a wooden conversation heart on a dowel and a package of hearts .
I removed all of the hooks and ribbon from the hearts.
I cut the dowel so that once poked into the ring it would stand in the middle. It is very simple to place it onto the ring, just poke it through the burlap and into the foam; it stays secure and stands straight up. I then made a little bow out of some ribbon I already had, I used yellow to match the heart in the center. I then hot glued all of the hearts around the ring.
The last step is tying a ribbon at the top to hang the wreath on the door.
And that is it :) If you end up making one let me know, I would love to see how it turned out.