9 year old daughter hates girls and will only play with the boys

[rosajois]

My 9 year old has gradually become more boyish over the past year. She hates pink and all things that she considers girly and mostly wears boys clothes. Lately she has started exclusively playing with the boys at playtime too. She has/had a girl best friend, who my DD still wants to be her friend when DD wants her, but is pretty much ignoring her at school, so this friend is now finding other girls to play with.
I'm really worried that she will isolate herself socially with this attitude. The boys may play with her but they aren't inviting her on playdates or to their parties for example. I've tried talking to her and explaining this, and also pointing out that to have a friend you need to be a friend, but I can't seem to get through to her. Maybe I shouldn't be worrying about it at all, but I just feel that she isn't choosing an easy path for herself.
Any advice would be much appreciated. Has anyone been through this before?

[MattDillonsPants]

My niece went through this OP and it was mainly because the other girls were maturing too fast for her. Even at 9 some of them were talking about boyfriends etc and others were deemed too "silly" for her.

She grew out of it by 11. She's 12 now and in high school....she doesn't hang out with boys anymore.