Female love is an emotion that is very temporary and situational. According to kaotic, "Love dies out in an LTR and all you're left with is if they complement your life or not. In the majority of times, a woman is 'annoyed' or 'isn't haaaaapy' or 'it just isn't there anymore'. Men gradually erode their own foundation of game and frame and lose everything."[1]

Netanderthal Man writes:[2]

The reason people accept the existence of unconditional love script is childhood. Your parents loved you with all their hearts and the template for what love is supposed to be was set during those early years. You loved them back in the same unconditional manner. And it was great. But your woman is not your mom. She is a fickle-minded person who’s most likely looking out for a prettier branch to grab right now.
Make no mistake, even when a woman is deeply “in love” with you, her love is not unconditional.

Most likely she’s madly in love with you because you are the man who rocks her world.

Keep being that man if she makes your life better, or discard her if she doesn’t. So, she loves you because you’re the best high-quality man she can get, but this sooner or later be subject to change. If at some point she feels she can get a man perceived as higher quality than you, her love for you will decrease exponentially. This is what we call conditional love—a woman’s love.

Smartphones are reducing women's ability to love even further.[3]