<human>: Provide a brief overview of the text.

I have been friends (in a work environment) with them all for years. Didn't see them much out of office but still good relationships. We would get together for work related activities, say a luncheon for charity. Have a few laughs in the office, get things done, seemed pretty peaceful.

But, these days, they make plans to see each other on weekends and after work frequently and never include me. They are all doing an exercise plan together, while isn't my cup of tea, they didn't even ask if I wanted to do it with them. They all planned it around me. Then they organise fun things afterwards, "oh, after our run we can go get our nails done! Okay, great!" Then invite all of the girls in the team except me. So five girls all get to do things, but not me. They even say "oh, ask other girl and other girl if it's good for them!" I'm sitting a metre away watching them.

Now, I don't always want to do the things they have on, but the fact that they plan it, do it and then tell me about it on Monday...it all feels a little weird. Like, something is wrong with me and they think I know what it is already.

Why do people do this?

We hired a girl nearly a year ago (I've been there for five years, so longer than every other girl on the team) and that girl has sort of moved in on the group nicely. They include her frequently and she even has the nickname other staff used to call me. It has been transferred on to her.

When they have a special occasion, like Christmas, one girl who I thought really liked me in the past buys everyone something to wear (reindeer headband, Halloween themed horns, etc) but for some occasions, all the girls got something except for me. Then they talk about it in front of me. "Oh, they're just two bucks, don't worry if they break."
<bot>: Coworkers make plans in front of me and then talk about how fun they were around me like I am not there. Why? Is there any way I can stop it from bothering me?