If he plays the role of an understanding friend, a supportive pillar, a protector and a pampering partner, all as and when you need the most, then he is certainly yours for keeps. If you he is the name you can think of when in trouble, when happy, when sad or excited, then be certain that you have found your Mr. Right.
But dear girls, do remember that these signs should be thought about only after dating for a reasonable time period to eliminate the chances of infatuation overriding your senses.