I can only speak from my own experience. When I fell in love, really in love, it was an overwhelming emotion. I suddenly had no choice. I HAD to be with him. Every night when he would go home (before the days of living together or sleeping together) I actually felt physical pain when he left. Still with him by the way, 41 years later.
I always am amazed when I see someone who has been asked to marry and they have to think about it! No, if you are truly in love the choice is made--they become a part of everything about you.
As j3wils said - if you have to decide, it is not true love.