When earth loves heaven, there will be someday a split track between them. Either both stays still on their position, or a gap divorces the two to their bottom hearts.
It could be a narrow bridge that catches their soul, but its suspension, vulnerable to fall. Indeed their love is a glue-bridge, that brings these two entities being one. It unites them, until its liquid hardened and freeze. So the glue becomes thinner day by day, at the end its will be broken.
So, how to make these tracks being one? It's either earth that climbs to heaven or otherwise, heaven falls to the earth. Sure, there will be two heavens or two earths then, but not a pair of earth and heaven anymore.