If you are going to wait until you are sure of the depth of the love of the other; and the other will do the same, then you are wasting the time that is supposedly meant for showing each other the depths of your love. Being too cautious is not intelligence, it's cowardice.
Love the other as you love yourself. Not too much, not too little. Just enough to build strong foundation or enough to be able move on.
♥ MaNin