CANCER MAN I DONT' UNDERSTAND

I CANNOT UNDERSTAND WHAT IS HAPPENING. I HAVE BEEN GOING OUT WITH THIS MAN FOR ALMOST 5 MONTHS. I THINK HE CARES. HE WRITES ME BEAUTIFUL POEMS. I ONLY SEE HIM ONCE OR TWICE A WEEK BUT WE TALK OR TEXT MESSAGE AT LEAST ONCE EVERYDAY. WE JUST HAD DINNER ON WED AND THINGS GOT HOT AND HEAVY. WE HAVE BEEN INTIMATE TWICE. HE GAVE ME A CD AND WE SPENT ABOUT 2 HOURS JUST TALKING AND JOKING AROUND.

YESTERDAY HE MESSAGED ME HE WAS SWAMPED AT WORK AND I SAID I WOULD CALL HIM. I LEFT TEXT AND VOICE MESSAGES AND HE NEVER CALLED ME LAST NITE. I TRIED TO CALL TODAY AND THE VOICE MAIL CAME ON IMMEDIATELY LIKE THE CELL IS TURNED OFF. I EMAILED AND STILL HAVEN'T HEARD ANYTHING.
HE IS SUPPOSE TO LET ME KNOW ABOUT A VACATION DAY HE HAS COMING UP AND WE WERE GOING TO PLAN THE DAY TOGETHER AND I NEED TO KNOW SO I CAN PLAN THAT DAY IN ADVANCE AS WELL.
IS THIS NORMAL TO BE EXTREMELY HOT AND COLD? I KNOW HE WAS STRESSED OUT AT WORK. DOES THE STRESS MAKE CANCERS WANT TO KEEP TO THEMSELVES?
I DON'T KNOW WHAT TO DO. SHOULD I JUST EMAIL HIM AND SAY I CAN'T DEAL WITH THIS. THIS IS INCONSIDERATE BEHAVIOR. I AM TRYING TO BE UNDERSTANDING BECAUSE THERE IS SO MUCH ABOUT HIM. I AM A PISCES BY THE WAY IF THAT MEANS ANYTHING,,,THANKS ANY ADVICE IS SO APPRECIATED.