My friend invited me to a party with some of her random friends. I was looking forward to going to this party. So I obviously made plans around that day, however she then texts me the day before saying,”Sowwy u wanted me to be straight up with u so I don’t want to bring u to that thing on Saturday.” Initially I was cool with it, but then i was a little offended because I already thought I was going. When I asked for a reason y (and I wasn’t rude about it) she said “no” followed by “sorry lol.” Well, I talked to her the day after the party and told her how I felt about it. She never acted like this before so you could understand my surprise. Well I decided to get back at her so she could understand how I felt.
I had my birthday coming up and I wanted to celebrate by inviting some friends. I told her a week in advance, however the day before I told her I didn’t want her to go. 
Now she’s calling me an asshole. My other friends say otherwise. AITA