Guarding your heart takes effort on your part. Do not let someone else invade your space and affect who you are and what you stand for.
When you guard your heart, you will grow spiritually as well as emotionally. You will begin to focus on what’s important in your life to the fulfillment of your purpose.
This does not mean you have to shut yourself off from the world or from having close friends. Instead, you should be mature enough to have friends and conversations with them without falling prey to what is going on in their lives.