Step 1:
Get a square paper, and cut it into a rectangle.

Step 2:
White side up, fold into half and unfold.

Step 3:
Fold the bottom two corners to the top center.

Step 4:
Fold the bottom point to the top.

Step 5:
Unfold.

Step 6:
Open up the first layer, hold on to it.

Step 7:
Placed a finger at point D, pushed point A to point B. Bring point C down to meet point D.

  
Step 8:
Do the same for the left side. You should get a similar shape as the above.

  
Step 9:
Fold the left and right flaps at the bottom to the top. Then swing the back layer down behind.

Step 10:
You should get something similar as the above picture! Now, turn behind.

Step 11:
Fold point A to point B for both side.

Step 12:
You should get something like this!

Step 13:
Fold the left and right sides a little bit.

  
Step 14:
Fold point A to point B for both sides.

Step 15:
Fold the bottom flap upwards, crease sharply and unfold.

Step 16:
Turn over and you now have a heart with a stand!