No, I'm afraid you're mistaken. Having a GF does make you a man.
My top ten reasons why a GF turns you into a man.
10. She needs money all the time, therefore the man has to bring home the bacon.
9. When forced to go shopping with your GF, you have to stand for hours and lie to your GF if the dress doesn't make her look fat but it really does. That will turn a limp boy into a man.
8. In the bedroom, let just say that the GF is like a diesel engine and the man is like a bottle rocket. The diesel has to WARM up before it really can go but the bottle rocket goes POW, "Oh ah yes!!" then pssshhhhhhhhhttttt and you're done.
7. If the GF wants to redecorate the house, guess who has to do the manual labor?
6. She'll want to watch chick flicks but she ain't going alone, guess who'* being forced to go?
5. She'll want you to stop drinking and getting smashed. That'll take a lot of willpower
4. What if she'* vegetarian and you're not, guess who gets the way? That'll make a man out of you.
3. Guess who will pick out your clothes? Obeying her will make you into a man
2. Who gets to see the violent part of PMS? That'll make you into a man
And number one is: She'll be alway right. Confessing that she'* right will make you... Oh never mind.
See my point?