First open a new file that would have 450x450 px and 72 dpi. Then paint it with the shown color ? 01062E.

Create Valentine's Day greeting card in Photoshop CS

Take now this tool and represent an ellipse colored with this color?s code: B9B9B9.

Create Valentine's Day greeting card in Photoshop CS

Blending Options-Outer Glow

Create Valentine's Day greeting card in Photoshop CS

Take
after that the usual instrument for selecting the necessary figure from the table below.

Create Valentine's Day greeting card in Photoshop CS

Take then another instrument and make the necessary corrections on the heart figure.

Create Valentine's Day greeting card in Photoshop CS