When you consistently reject someone for YEARS that loves you and refuse to communicate it hurts and damages them. Things will never be the same because now they are afraid to open up and love or allow anyone else to love them with the fear of being rejected again.
They have now gone into protect mode promising to never allow anyone the opportunity to get close to them. Sometimes all you want is him/her and when they don’t want you then you’d rather be alone.
Loving yourself is so important, knowing your worth and if you ever feel unloved God has an unconditional love that’s deeper than you can ever imagine.