I didn't have any pink seed beads at hand so I did this in 2-tone. You can use 2 mm bicone beads instead of the seed beads or use same color throughout. You can also use 4mm/3mm combination to make it bigger. If you don't sew up the sides of the inside you can insert a picture in between the two hearts and use it as a picture frame.
3 x 40cm Fishing line (4 lb weight or about 25 gauge) - 1 per heart and 1 for sewing up outside
1 x 30cm Fishing line (4 lb weight or about 25 gauge) - for sewing up inside