What I am about to say will shock you.
Love does not exist, it's only a dream fantasy to make us believe there is a reason to procreate. I've been with the same girl for 5 years now, we also have a little girl.
After 5 years, I now believe that love does not exist. The passion and desire will fade away one day or another. We live together as friends now in an appartment and we will seperate next year.
Facing the truth is really hard. But the main reason about sexuality is survival of the species. Love is just a very strong emotion (or sense) that will bring a male and female to procreate.
Society and especially religion, has created the "couple" and marriage bullshit.
Conclusion :
A man and a woman can't stay has a couple forever. Those who do stay together, do not love each other anymore after a long period of time, they stay because of habit. Believe me, facing those facts is really hard
I now believe in friendship relations with sexuality