Why do you want to go to Heaven? I assume that, when it comes time for you to die, Heaven is the place you want to go to—only a madman, or worse, would desire the alternative. But why do you want to go there?
Marriages grow cold not because husband and wife begin falling out of love, but because they begin falling out of repentance. The sin-swept wane of many years and the hardening effects of bitterness left unchecked and unrepented of render many cold and callous, unable and unwilling to turn from sin. Unwilling to towards a living and loving Savior in Christ who stands ready to forgive those who forsake their sin and cling to Him for lasting healing.