I dont know wht to do...?

our term got over today.so me and 2 of my friends were going to have a girls day out tomorrow.but whn i called thm up 2 confirm d program & decide abt the time we would meet at the mall,one of thm says she has to go some place & doesnt tell why.she just says she has got some wrk.the other says its ok with her if we go out but better if we dont.we decided abt tomorrow's programme atleast a fortnite in advance.whn i called thm both were together at the cafe.I also heard some guys voice in background.i think they are going out with their boyfriends.i dont understand tht if they are going out with their bfs why arent they telling me.i feel hurt.they are also taking me for granted nowadays.during the exams whenever they have a doubt they wud call me up and ask but when i ask they say you know we dont know anything whras they knew everything.i am better at studies at than both of them so i dont mind solving their doubts but i dont even like this.wht shud i do?i am confused pls help me thnx