Perhaps the only bad thing about a lifelong romance is, eventually, someone has to die.

Short of an unnatural occurrence – a violent crime, a suicide pact, a plane crash – a wife or a husband will be forced to go on alone. After decades of shared life, love and happiness with her husband, Ralph, Thelma Zirkelbach says surviving “till death do us part” can be like wandering lost in a foreign wilderness.

“Ralph has been gone for 7½ years now; when I first lost him I had no idea that I’d have to get used to an entirely new lifestyle,” says Zirkelbach, author of “Stumbling Through the Dark,” (www.widowsphere.blogspot.com), a memoir about an interfaith couple facing one of life’s greatest spiritual challenges.

“When you’re grieving – whether your loved one is suffering from a terminal condition, or he or she has recently passed – practical things like funeral arrangements, short- to long-term financial issues or even what’s for dinner can seem very conceptual, abstract and far removed from what you’re feeling.”

But the biggest challenge is having no one with whom to share your life, she says.

“Family milestones, major news stories and technological changes are just a few things Ralph has not experienced with me,” says Zirkelbach, a grandmother, speech pathologist and Harlequin Romance author.

She offers five areas in which couples can prepare for both the process of dying, and life after death:

• At the hospital: We tend to take our health for granted until we don’t feel well. Sometimes, it’s something we can’t shake; for Ralph, flu-like symptoms would prove to be leukemia. At one point during her life at the hospital with Ralph, Zirkelbach kissed her husband before he was sent off to isolation as part of his treatment; it would be the last kiss for an entire month. When a spouse gets sick and requires extended hospital treatment, be ready for a shortage of parking, general uncertainty and an irregular schedule. Zirkelbach’s sanctuary during Ralph’s time at the hospital was the hospital’s café, where she “gorged on smoothies and cookies – sweets are my comfort food,” she says.

• Finances: This can be one of the most difficult areas because, too often, couples don’t prepare for the eventuality of a death well in advance. While older couples are more likely to be financially prepared for a death, younger couples are often caught blindsided by the loss of a spouse. Consider getting professional assistance from a financial expert.

• Spirituality: What is often put aside as secondary in daily life can quickly become the primary thought for someone who is grieving. Zirkelbach and her husband were an interfaith couple – he came from an evangelical Christian background and she is Jewish. Ralph was admitted to the hospital as Jewish; he had planned to convert, but as his condition worsened and his family became more involved, he stuck with Christianity. This was emotionally confusing to Zirkelbach during an already stressful period. Understanding each other’s views on matters of life and afterlife before a loss is helpful.

• Bad things can still happen: When Ralph got sick, Zirkelbach’s mother was also beginning a rapid decline, and ultimately died before Ralph. “Just because a terrible thing is happening to you doesn’t cancel out the possibility of another one happening,” she says. “There’s no credit limit for misfortune, which is all the more reason to show love, regularly, to the people you care about the most.”

• The journey of letting go: Zirkelbach quotes Mary Oliver’s poem “In Blackwater Woods”: To live in this world / You must be able … To love what is mortal … knowing / Your own life depends on it; / And when the time comes to let it go, / To let it go. “I had no idea I could survive all by myself; it seemed like I needed help with everything,” she says. “But I’ve learned a very important lesson — I’m much more resourceful, much stronger and much more independent than I ever thought I was.”