AITAH for ending my friendship of 7 years because she decorated her house for Christmas?

Now that I have your attention, there is WAYYY more context than that.

This friend, we will call her Megan, (19F) and I (also 19F) have been friends since freshman year of high school. We have been each other’s rock since with very few “fights” and they were typically over really silly things.

Well Megan is dating a guy who we will call Brad and has for about 8-9 months. They dated in high school a few years back but he cheated on her so they split. They are now back together as she ALSO cheated on her ex with him, ultimately ending up rekindling their “connection” and now she lives with him at his parent’s house.

Brad has a very big drinking problem and drags Megan into it. Megan has never been a super big fan of drinking as she is very small and a typical lightweight (I have had to clean up her vomit numerous times). Well when they decide to get black out drunk (every weekend) I am generally their only option for a sober driver and basically babysitter. I have realized that every time she asks to hangout it’s always because she needs something from me, such as my services. She will sometimes pay me but she never does when she says she will and it will take her DAYS of me asking to send the money even though she knows I am very tight financially.

Megan also has a very big lying problem and I have come to realize she is a pathological liar who has a hard time telling the truth about anything. She will flake on me or stand me up on days we are supposed to do something together and tell me bullshit lies about why she has to cancel, just to go on instagram and post her hanging out with other people. Most days, she just won’t even text at all, leaving me high and dry on a day SHE planned something.

Well this all comes down to last week when she planned to come over to my house for the night because we hadn’t seen each other for a month at the time. We planned a week in advance and she was talking all week up to the point about how excited she was. The day before she mentions how her and Brad are going to go look at a house together so she’ll be over at 5:30pm. I say okay as I had an interview at 4 so it was perfect timing. Well I never heard from her all day on the day she was supposed to come over and I finally texted her if she was coming and she said “no because everyone was sick and she was disinfecting the house”. I just told her it is what it is because what else can we do if everyone is sick. Next thing I know she posts on social media a picture of the house decorated with a tag saying “so glad we got to do this together @Brad’sSister”. At this point I was furious. I drop everything for this girl when she needs me and I don’t even get an ounce of reciprocation. I went to bed with no more left to say to her.

The following day was Thanksgiving, and she went out of her way to make a social media post highlighting everyone in their life she is grateful for and guess who wasn’t in it…me. Needless to say I have realized at this point that the love and friendship I had for her was not being shown back to me. I know my worth, I am a good ass person who deserves the same kind of respect I give others and she doesn’t deserve me anymore. I have some people telling me I’m overreacting so Reddit, AITAH???