The reason why women can't genuinely love men is that males always have to fight for their spot. Whether its their order in the pecking order, who gets the most resources, who gets a chance to have sex, who gets X and who gets Y. Groups of men have always been at war with each other, competing for resources and females. Women always latch themselves with the male with the most affluence, resources, status, etc. The moment the male loses those things, he also loses her. Also females have always welcomed rivaling male groups who defeated, possibly even killed, their own men, with open arms and with open legs. A female of any species falling in love with a male is a hindrance for her. Such a trait gets weeded out, because it actually harms females of that species. Women really can't devote themselves to any man. There's no love, no caring, she views it as a transaction, always.
This isn't true for males though. To ensure optimal survival for the offspring its beneficial for the species that the male actually 'falls in love' with the female and sticks around her and the offspring.
It could be cool to have a girlfriend but since I know they are not capable of loving men it is pointless. Loving men is not their instinct, only hypergamy.