Love Is a Much-Debated Thing
. . . make a one man weep, make another man sing . . .
More love beneath the fold.
And powerful, your health depends upon love, and friendship, so get some.
How To Make A Relationship Last: 5 Secrets Backed By Research
Eric Barkers posts are worth reading, just go subscribe and get them every time they come out, they are all great.
So, how do you keep the loving relationship with your spouse, so you can live forever? OK, not forever, but if you stay married it will feel like forever, at least comparatively, because if you don't you will be dead. I advise sticking to marriage.
Hint read Barker.