i might have to break promise

it's gonna be 3 weeks i didn't get to see dear dear and it's gonna be the 4th week if i had to go down to kl accompany my mom. well, i felt bad for not granting my promise to dear dear because i had promised him to fetch him back from kampar after his exam, now he might have to find his own way to get home. i knew that breaking promises is wrong but my mom needs me to accompany her and since there were things happened lately in the family. i felt headache worrying about dear dear and my mom. to tell the truth i did not tell my mom that i am going to kampar or else she would be very angry with me because i've been fetching him here and there. i don't want her to have a bad impression on him. but somehow dear dear seemed to misunderstand and he doesn't understand about something. so he got upset and he don't know who could come and fetch him but he told me not to worry and that he can settle by himself. i felt bad that always giving him trouble during his exam time and it's especially his last paper. almost every quarter of exam is always like this. and my mom didn't tell my grandmother that they are going to down to kl this weekend, i also don't know what is she thinking, making me almost blow up the secret. why am i always in the middle of things? and i would easily shrew up things? i have to choice to make, 1: accompany my mom to kl because she scared she would faint during the journey and there is no one else to drive for her. 2: go to kampar fetch dear dear back so that he can play on sunday worship because pastor is not around. which one shall i choose?