A "committed" relationship should be as permanent as a parent/child relationship -but it's definitely a different sort of relationship. One adult is not responsible for another as with a child.

my kind of woman.

As per my understanding ..Yes love is unconditional
..And it should we love a child unconditionally..Same we can love a partner without conditions..We can do this..It is not hard to understand..Just feel the love

In reality there is always a condition that can stop love.

You find out they are a murderer.
You find out they're a child molester.
You find out they were lying about loving you.
They start abusing you.

You can have unconditional love for a child or your parents/siblings but its extremely unlikely you can have unconditional love for non-blood relatives.

BUT....
Since the love you feel is within you and nobody else can feel it, you might have unconditional love according to the experiences you have.
However, reality too often makes us wrong.
There's always something that can break the love we feel.
Thinking otherwise is delusional.

And a different kind of love

A biological relationship is different from a social relationship. Illogical to compare the two. Accept the dialectics.