I Will Love You Forever by Tatsuya Miyanishi

When a female Maiasaura finds an abandoned egg in the forest while picking berries, she brings it home to hatch with hers.  When the baby is a Tyrannosaurus, she holds it close and names it Heart.  She loves him even if he is different.

Museyon and Net Galley allowed me to read this book for review (thank you).  It will be published June 1st.

One day while out hunting berries, the little Tyrannosaurus runs into the adult who lost the egg.  He tells it he's a Maiasura and the T-Rex tells him he's not.  The little one runs away home and his mother assures him she loves him and he's her heart.  The next time he goes to pick berries, he doesn't come back.  But she finds a big pile of berries where she had found the egg.  Love changes but it doesn't die when you really love someone.