I think it is a question of temperament. There are men and women with an expansive vital nature, normally called as extroverts who easily make friends. There are others who are shy and avoid people, introverted so to say. These have fewer friends and sometimes can be loners. Genuine friends are of course very rare and it is arranged by destiny rather than by tact. Essentially a lot depends upon the art of conversation, the ability to break the ice and yes, the inbuilt temperament that throws out and receives the vital forces freely circulating the vital energy like money and gossip. There is no need to become like that. Be your true self, that is the best.
Affectionately,
Alok Da