You think the final act of love is setting them free to Rainbow Bridge? That is not the final act of love. The final act of love is releasing them from your leash of grief so they can be free in the heaven on the other side of the Bridge. Until you resolve your grief, you bind them to you in the land between Heaven and Earth while they wait, suspended between the worlds, for you to heal. When you are free of your grief, they are free of your grief.