Gf/bf
I think it matters a great deal, especially for males.
I think that single men are more disfunctional than women, but I think this is more based on the number of same sex friends. I think that generally, its harder for male friends to fill the void to same sex friends, than it is with women. This is based on my (and other's) stereotype of women having more of an emotional bond with their friends. I think that men can displace neuoris caused by lack of a partner with sport better than can women. But this depends on the level of your angst, whether it inhibits you from sport.
I also would argue that sex is more important to men, while love is equally so to both sexes. I find that I compromise myself too often when I am without sex. I hate it that I am wired to leer at women, or be affected by their bodies and not minds. I should get some medication to destroy sex drive. Anyone know anything about this?
I think that the greatest difference as a guy having a girl would be the level of confidence with the opposite sex. This kind of comes from the above point about not being frustrated and turning away women with blind lust, but also the familarity of talking to women (its not so complicated once you are doing it regularly). I think you could be a guy with a girl, but still not have it help that much with same sex friends, if that is the only person you talk to. As a socially phobic, anything different puts fear in me, so anything Im not familar with regularly is harder. Thats the whole point of SA, the more you socialise the sooner you find out its not as magically or special as your fear leads you to believe.