I have this big crush on this girl that i know likes me back, but her sister hates me. What do i do?

I've had this crush for like a mwaka and i learned that she liked me back when, my friend told me that "so and so" likes me. The sister hates me because, i was a jerk to 2 years zamani and ive tried severaal times to make up for it, but the sister still hates me and i dont really have a problem with the sister. i dont want to tarehe some one that has a sibling hating on our relaitionship i have a feeling it wouldnt wirk out.