My opinion? Wow.. that's a loaded question.. lol
There are so many forms of love.. love for parents, children, siblings, friends, etc..
But I guess you are speaking specifically of being "in love"?
My opinion of being "in love"
That person makes your days complete. Without that person, you feel an emptiness..
You feel an emotional connection, a bond, your heart is full of happiness and you show it uncontrollably..
Being in love, it's true that Love is blind.. you do not notice the persons outter appearance, or faults.. when you look into their eyes all you see is love.. It's like looking through the window to their soul, and you notice nothing else around.. you get lost in the moment.. wishing that time would freeze..
You think of the person persistently..
You know without a doubt, that is the person that you want in your life, for the rest of your life, and no one else..
You have a strong desire to make that person happy at all times..
Their words or touch can make your problems dissipate, even if only temporarily..
Well, I know I've no where near covered all of the aspects of love, but this is some of the things that come to mind :)