"Love has reasons reason cannot understand."
That's why when it comes to reason, love doesn't get involved!
It doesn't matter how much you've loved, or how much you were in love. Because when the serious talk starts, the love is forgotten. The love has already done its job, bringing you down into serious talk! Yes, that's the only reason of love, bringing you down into serious talk.
So my advice is: Don't love too much, more than necessary. Don't waste love, when at the end it only takes a secondary role in the whole story of life.