i lost all my friends

hey i’m 18 i don’t want to waste my youth k really don’t. i’m doing really bad in college and might get kicked out i don’t even know why. i used to be amazing at school but then one bad moment and i never picked myself back up. i then lost all my people closest because i lied to them really bad. i need to make new friends because i feel so lonely i never felt like this ever i don’t want to waste my youth sulking. i don’t know what to do