How do you open your heart?

The first step is not to actually think about it and let it happen naturally. The more you think about opening up the more difficult it will become. Also, it would be a good idea to choose carefully who you open up to as it is not always wise to do so with everyone we know. Your behaviour is a defense mechanism and there is probably a very good reason for it too. If you write songs you are indeed in touch with your emotions and are sensitive thus easily hurt. Keeping emotions hidden can therefore be a good idea sometimes. Be selective with you you open up to. Good luck and take care!