What did I do wrong

Nova

I've been friends with this girl for over a year now but throughout our friendship she's always kinda acted different towards me when she's with her other friends but I never thought much of it cause we still texted and hung out often I thought we were close but for the past 2 or 3 weeks she's seemingly been ignoring me she was supposed to have a birthday party 2 Saturdays ago but had to cancel because of a family emergency then the next Saturday she cancelled because of rain now the party was on a Saturday so I texted her Friday night and asked if it was still on since I hadn't heard otherwise she said no and that was the last time she responded to me so Saturday rolls around no rain but she already cancelled and I messaged her and said "looks like it didn't rain darn" no reply so I let it go I assume she's busy but no she posts all over social media and I know she's texting other people cause I asked one of my other friends who is also her friend if she's texted her and apparently they talked earlier that morning so I know she's not busy also I see her active now thing in FB and insta so I'll check my messages and she hasn't even opened them I also asked her if her party was gonna be this weekend so I could avoid a last minute gift and guess what no reply she's not even opening them I'm really hurt cause I thought we were close.....sorry I really needed to vent