PLEASE HELP! SHOULD I BE THEIR FRIEND?

I went to this place with my 1 friend megan. You did something and it costs 40 dollars ciara didn't have the money she bought tickets 4 demi lavato . It was cancelled. 2 weeks after that i invited megan and my friend dela. Ciara called when me and meg was in the car. She heard we were going to that place in 15 min. and she left a NASTY voicemail(how she didnt get the tickets yet) Then my friend dela couldn't come bc she also wanted to go to jess's bday party. her mom said it was 2 much so she picked 2 go to jess's We have been bffls since kindergarden we are in 6th grade and she just met jess 1 month ago. GIVE ME YOUR OPINION ON BOTH CIARA AND DELA.