Step 1: Begin by making the envelope. Cut the paper so that it is a square. Lay it down so that it is diamond shaped and fold the two sides in as well as the top and bottom. I overlapped them a bit and cut out the parts that overlapped as you see in the picture.
Step 2: Glue the bottom of the left and right flap and bring the bottom flap over them. Press down and hold for a few seconds.
Step 3: To make the inside lining of the envelope, place the Valentine’s designed paper face down. Trace the envelope (with the top open). Cut the paper out slightly smaller than what you traced. Apply glue and insert the paper in the envelope. Press down and hold for a few seconds.
Step 4: Close the top of the envelope and trace it onto a plain colored piece of paper. Cut out the rectangle slightly smaller than what you traced so it will fit into the envelope.
Step 5: Get creative! I cut out different sized hearts from the designed paper I had. I also used a fine tip black sharpie and added the word Love, some hearts and some squiggly lines. Make sure to leave some space for a personal note to your loved one!