Under everyone’s hard shell is someone who wants to be appreciated and loved.
Show appreciation and love to your family and friends every chance you get. Go out on a limb to show someone who is a little reluctant themselves to open up. In the end it will mean even more to them. Be gracious if you receive the same in return.
I give you a new commandment: love one another. As I have loved you, so you also should love one another.
John 13:34 (NABRE)