Two of my friends who do not commit ( the word alpha shall be excluded here)
Friend 1: Extremely peculiar and fragile sense of self worth. Derives it from perceptions of others. Everything he does is to look better in others eyes. To this end, he feels committing in relationship is inherently wrong and prides himself on stringing women along. While he is doing it for all the wrong reasons, it works remarkably well. He has had women chase him for the sole virtue that he has no respect for them and will not commit.
Friend 2: He is much more sure of himself and derives self worth from what he does. Much more emboldened in life, he strives to be the best and is extremely competitive. He is more old fashioned with women, but has a dominating personality that women love. He does well online and has had a lot of success ( oddly enough, he envied my ability to cold approach back in the day, but I thought he was more successful). That said, he never really commits because he feels he needs to find the type of personality he seeks to match his. As such, he never settles and will not initiate sex even while dating. This is very powerful and the women will continually try and crack this veneer. The ironic thing is that by not pursuing sex, he gets plenty.
Two different people. Two different approaches to being aloof. Two similar results. I would like to see examples of others.