My 5 cent experience here for all brothers.
Woman in our society today is very different from our parent era.
In the past girls have less chances to socialize, as long as you can get their attention long enough and wait, you will get the girl.
Better girls now are natural social animal. If they are attractive enough, they have no lack of guys around them. they lost one BF today the next week they can easily get a replacement if she wanted to. If we the guy are not fast in our action, the girl will in no time end up in somebody's arm.
Girls in our time are clever, more independant and most are financially strong. They no longer just go for rich alpha male figure.
What they look for is a bit of magic, a bit of romance and a bit of gut from us guys to say "I like/love you".
Of my last 'few' relationships, the gal that took me the longest time is 6mth. On average, the rest is about 2weeks. Girls likes to go for the 'feel', Got to hit while the iron is hot. If not, the 'feel' will be 'stale'.
Maybe some brother do not like what i share, but it has work for me.
And to add, i have been true to all my relationship, i am not a playboy.