Hurt by a best friend?

my best friend and i started out as me being a babysitter. it turned into a great friendship best friends almost sisters type thing but now im feeling pushed away for other people. on top of it all she went to a concert and i was watching the kids i was so jealous she was going and i was stuck watching the kids so i prob went over bored by constantly posting i was jealous. she got pretty upset and told me a day or so later i told her i needed to either be a friend or her sitter this wasn't gonna work anymore she got all upset and said well then why did you become my friend. well she had bought tix for us to go see a7x in Orlando but we were having this fight and she said she felt like she had to walk on egg shells around me so she picked out another friend to take. I had no idea she was planning to take me till i got a slap in the face text that said by the way i WAS going to take you to the concert only to obviously found out that she was taking someone else most of this argument came frommis communicationn via text i personally feel she rushed on the decision to take someone else or maybe shewasn't't going to take me at all. either way i let this go for a while but yesterday was the concert and now all my feelings of hurt have come back. i dont know what to do.