Yes, love is a choice. You choose to spend time with someone that you may have some chemistry with, and when feelings begin to develop you choose to encourage them or not.
Even if you believe in love at first sight, you can still choose to walk away or not. You can choose to ignore the crush of "love at first sight" which is really just a rush of hormones. That zing with "love at first sight" is your pheromones telling you that the person is attractive and might be an option.
Falling in love doesn't really happen all at once. It's a process. Just like a fall. When you trip or fall off something from a height, it takes a while to hit the ground and feel the hit and then the results of the hit.
Your brain is in far more control than your body. Your brain is really your biggest sex organ. Love doesn't just "happen" to you, and a woman is not simply an extension of a man. It's Woman and Man. Not Wo + Man.
Loving your children isn't about "falling" in love. Loving your children is (or usually is for most women) automatic. It just is. I would also never use the term "falling in love" regarding children because that's just icky. It's a romantic term, not a motherly term.
I love my children. I'm in love with my husband. I love my children because they're mine, I created them with my husband, they're part of me, they're biologically bound to me... we're bonded from before birth so I simply love them. I CHOSE my husband, so I'm in love with him. Big difference.
I choose to stay in love with him by working hard at my marriage WITH him, so that we can both be happy. He's my main love. I love him above all else. That way, I can make sure that we can both love our children. Happy marriage, happy home and all that.
There's no such thing as destiny. But that's a completely different conversation than love at first sight. [Ignoring someone that could/is dangerous for you, and likely abusive, and walking away from "but I LOVE him!!!111!!! eleventy!!11!!" because of love at first sight isn't a passionless heart; it's the adult thing to do. It's what you do when you want to choose a father and a husband who will last your entire life and you can STILL choose someone you feel passionate about.)
Their = belongs to them
There = something over someplace else OR a great way to start a sentence
They're = short way to say "they are"