Communication problem

Dear diary,
this week has been one of the worst week in my entire life. i screwed up my relationship with my sis and my new boss called me up.Let me start with what happened with my sis. She called me up to ask on my hantaran list.but again, me being the b*****d ended up yelling back at her telling that i have wrote everything down.i regret it...really i am..i just dunno what got into me that i blew up. so, i called her back and apologize.but i know the damage is done. she is hurt and all she wanted to do was helping me with my wedding.
Then with my boss,I was called up to meet him in meeting room and was warned for a lot of reasons.i was late for a meeting, i didn't communicate well with my colleague,i didn't reply mails bla..bla...
But it all comes back to one main problem :Communication.
I do have communication problem.with every one...shit...how i hate myself right now..