Dear,
Let me get one thing straight, it's nobody's responsibility to love you. But let me tell you something, feel that pain. Yes, that feeling you have right now. Feel that sorrow, that loneliness, that anger, feel that rage. Feel it and let it fuel you. Let it fill your heart, your mind and your soul. Then, remember names, remember faces, remember every single person you loved. Let the love that once flow in your blood run cold. Lastly, replace it with hate. If it's no one's responsibility to love you it's not yours too. Let hate replaced love and show them what it's like to be unloved.
With hate,
Someone Who is Unloved