Hard to say. A lot would depend on the themes, art style, and how well the relationship is portrayed in the manhwa. Sometimes it could be a yes, but other times, not so much.
I'm not sure which specific'marry my husband real story' you are referring to. There could be many stories with such a title or concept. It might be a personal memoir, a fictional story inspired by real events, or something else entirely.
Searching in local libraries is a good idea. Librarians can also be of great help. They can guide you to the right section where you might find the story if it exists in their collection, whether it's in the form of a book, a magazine article or something else.
The title 'Marry My Husband' sounds like it could be a really interesting story. However, without more context, it's difficult to tell the full story. It could potentially be about a woman who has some sort of special request for someone to marry her husband, perhaps due to an illness or some other unforeseen circumstances. But again, this is just speculation without more information.
Well, you could try doing things he likes together to strengthen the bond. Also, showing appreciation and support for him can go a long way. Sometimes, small gestures of love and care can make a big difference.
One way could be to have heart-to-heart conversations regularly, listen to his perspective, and work on resolving any conflicts together. Surprising him with small gestures of love and support might also make a difference.