<human>: Can you condense the text into a few key points?

I realize the title sounds stupid, but I don't know how else to word it. I'll try and keep this nice and short.

My girlfriend moved here last summer, right after graduating. We met when she started working at my office, which is why she moved here in the first place. She moved here knowing nobody whereas I've lived here my entire life and went to school here. I have quite a wide group of friends that I hang out with frequently. We're the only people in our office under 30 so I figured I would do her a favor and introduce her to my friends so she could get to know some people. I figured she would start hanging out with one or two of the girls sometimes and would meet people through them.

What I didn't expect was for all of my friends to absolutely fall in love with her. I mean, I get it. She's my girlfriend, so obviously I like her. She's very charismatic and hard not to like. But she has started to take over. She hangs out with my friends almost every weekend, and sometimes during the week. As I type this she is out with two of my guy friends from high school bowling. I wasn't invited. Why? Because I can't bowl well and she can score a solid 250 every time. This past weekend she started teaching my ex-girlfriend how to play piano. All of my friends love her and want to hang out with her constantly.

And in their defense, they typically invite me. And my girlfriend always texts to see if I would like to go along, and says she wants me there. But she doesn't seem to get that it's not the same thing. I want to hang out with my friends, not always friends + girlfriend. I've asked her to stop hanging out with them and she just says that they're her friends, too, and nothing is stopping me from coming along, too. Like I said, she just doesn't get it. 

How do I get my friends back? How do I get my girlfriend to stop hanging out with them so much so I can hang out with them like we used to?
<bot>: Girlfriend infiltrated and took over my long-standing friend group. I feel like I've lost all my friends and want it to stop.