The Colors of Love

In this tutorial, I used this photo:

Open that photo then press Ctrl+B to open Color Balance, set properties like this:

You will get:

Create a new layer and set Blend mode: Screen

Pick Brush tool, set something like this:

Brush some colors in the picture, in this tutorial I used color blue, green, pink, red and set opacity 76%

You will get the result:

Create a new layer, choose the brush like this:

Put that brush several times in the picture

Pick Custom shape tool then choose heart shape

Make a heart shape then Ctrl+Click on heart's layer

Select Background and press Ctrl+J 2 times

Move 2 heart layers to the top of layer palette

Select the under layer in those 2 layers then do as the picture below:

Continue to press Ctrl+J to duplicate this layer

Select the top layer then go to Layer Style, do as these pictures below:

You will get:

Use Eraser tool to blur the border of heart

After finishing above steps, you will get the final result: