Trust issues

Yesterday one of my closest friend told me that i can be her study buddy and i said that i cant get up early even if a set 282992 alarms... and she told me that she can call me to wake me up. I trusted her but somehow i woke up 1 hour before the schedule. But i waited if she is ever gonna call cuz i didn't really think that she’d call me. She really didn’t call and i slept again. And she really said nothing. Now i feel down. And idk if i trust her again