Son doesn't like girls

My son is in high school now and he's a good looking young man. He's gotten comments on his looks since he was a small child. He constantly gets girls that ask him out and I guess it overwhelms him. He prefers to be around boys not girls. I got a call from the principal today because a girl asked my son out and ig he ran from her so she kept going after him to talk to him and he kept running from her. So.... He pushed her into a locker and shut the door and ran to hide in the bathroom... Yeah that was a not a call I wanted to hear from his principal, so for the next two weeks he has to see the school psychologist. I had a talk with him when we got home about how that's not okay but he just covered his ears and laid on the ground and screamed. I talk him to knock that off but he just screamed louder. When he finally let calmed down I talked to him and asked why he locked her in a locker and he said why and I said he can't do that. He said he just wants to be left alone. So I told him if he writes her an apology letter I'll tell the school and girls mom to make sure she leaves him alone.. I hope him seeing the psychologist will help.

Edit: He's always done the laying down, covering ears screaming thing. It's nothing new which is why I told him to knock it off. After a while he usually calms down.

@Bunny My son isn't going to lie to me about something like that and his friends confirmed that she kept bugging him about it. Sometimes teenagers just don't know how to take a no do plz don't call my son a lisr if you would call a girl a liar.

As for everyone else. All I'm trying to do is get this situation handled. I know she shouldn't have been harassing him, but how the school sees it he locked her in a locker. Also I don't think my son is gay. He's just sexually immature and doesn't understand or really like sexuality.