HIS mystery place (BxB Smut)

Damian was just walking around a park when he just saw a portal he thought it was just a dream so he went through, he's wakes up and after a while of being in this other world he realizes that he has fallen in love but he knows he can't because he will leave the world one day and leave his lover behind. Should he go back to the normal world into reality again or stay with his lover and spend his life with Finn and stay in his fantasy world?