My ex's grandfather died today, what can i do!!!1?

OK I WENT OUT WITH THIS GIRL..AND WELL WE HAD A FIGHT, WE BROKE UP JUST YESTERDAY...AND JUST YESTERDAY HER GRANDFATHER WAS IN A COMA. AND WELL WE WERE MAD AT EACHOTHER..AND I THINK WE STILL ARE..BUT WHAT CAN I DO TO SHOW HER I WANT HER BACK, AND TO COMFORT HER, I WANNA SHOW HER I WILL ALWAYS BE THERE, LIKE I PROMISED I WOULD. I WANNA CHEER HER UP CUZ SHE HAS BEEN CRYING ALOT SINCE YESTERDAY...SHE IS GOING THREW SO MUCH, FIRST WE FIGHT, AND LIKE THATS NOT ENOUGH. THEN TODAY HER GRANDFATHER DIES WHICH SHE SAYS WAS LIKE A FATHER TO HER.I FELL REALLY BAD THAT I HAVE MESSED UP WITH HER AND THEN THI S TOO HAPPENS. PLEASE TELL ME WHAT I CAN DO!!! SHE IS 13 AND IAM 14...BUT I LOVE HER SO MUCH..WHAT CAN I DO TO CHEER HER UP??!!! BUT ALSO USE HER GRANDFATHERS DEATH TO MY ADVANTAGE AS WEL....BUT ALSO TO KEEP IN MIND ALWAYS THAT SHE COMES FIRST WITH HER GRANDFATHER..PLEASE LET ME IN ON SOME ADVICE...THANKS!!!!!!