Unless you die with the one you first love and loved ever since by your deathbed.
Otherwise you won't have that/those failed relationship(s), you would have a very long lasting partner, you would have gotten married, you would have kids. And even so, you can divorce to proof both of you wrong. So where is the point where you can really qualify as being an expert in the subject of relationship? Yup, probably only by your deathbed.
