Going with the flow....

How can we understand when we are in love?
More importantly how do we realize it before we no longer have the opportunity..

I have always been a firm believer in "Going with the flow" of life...
Listening to my inner instincts while also practicing common sense...

But, lately I have had a couple of occurrences where I am left wondering...
Will I know when I am in love? Or will I just be so involved in finding soul...that I lose the chance to meet that perfect someone...if there is such a person...

So I ask you!
How often has "Going with the flow" and following your heart...provided you with the answers you seeked...??