Isn't there a point where people grow up and stop acting like 12-year-olds?

I'm in a situation that really pisses me off, and part of what pisses me off is that it pisses me off, if you catch my drift. For some insane reason, I have not been really accepted into my daily situation. It bothered me enormously for my first four or five months here, and then I sort of let it go as I got better acclimated to my responsibilities.

Now I'm working pretty independently on a big project, and it's going pretty well. I've had a review that went better than I could have expected, so I know my superiors are cool with me. But yesterday, I discovered that I had, apparently deliberately, been excluded from an onsite social occasion thrown on behalf of someone I deal with every day. It was a surprise for her, so it's not like she excluded me, but the people who organized it did.

I was telling my folks about it, and my dad thought I should tell my manager. But I'm not the kind of person who wants to whine to the teacher that the other kids aren't playing fair at recess, ya know?

This is very weird to me. It's not like I've always been Little Miss Captain of the Cheerleaders, but I haven't had a problem making friends at work, school, or volunteer organizations in the past. And while I have many friendly relationships with people in other groups, I don't get to hang out with them all day.

What the fuck kind of lameass, junior-high victory is it for someone in their 30s to exclude another adult like this? And why the hell do I care?

I'll tell you why; I'm a girl. The men I know just don't behave this way, and don't give a shit if someone doesn't like them. I used to work with almost all men, and never had issues like this. Guys do their damned jobs, and if they don't like someone, it doesn't matter. They want to know if you can carry your load. If you can come in under budget and on time. If you can make your goals. And if you do those things, you're fine.

I hate to sound anti-feminist, but sometimes women really suck ass.