It is a mystery why we fall in love. It is a mystery how it happens. It is a mystery when it comes. It is a mystery why some love grows and it is a mystery why some love fails.
You can analyze this mystery and look for reasons and causes, but you will never do anymore than take the life out of the experience. Just as life itself is more than the sum of the bones and muscles and electrical impulses in the body, love is more than the sum of the interests and attractions and commonalities that two people share. And just as life itself is a gift that comes and goes in its own time, so too, the coming of love must be taken as an unfathomable gift that cannot be questioned in its ways.
Remember that you don't choose love. Love chooses you. All you can really do is accept it for all its mystery when it comes into your life. Feel the way it fills you to overflowing, then reach out and give it away. Give it back to the person who brought it alive in you. Give it to the world around you in any way you can.
This is where many lovers go wrong. Having been so long without love, they understand love only as a need. They see their hearts as empty places that will be filled by love, and they begin to look at love as something that flows to them rather than from them.
Remember this and keep it to your heart. Love has its time, its own season, its own reason for coming and going. You cannot bribe it or coerce it, or reason with it. You can only embrace it when it arrives and give it away when it comes to you. Love always has been and always will be a mystery.