Adjusting to a Foreign Country

Hello Sir, I live in Australia for three years and i have seen many things¬† change very fast and myself as well. Like, before i was just doesn’t care about anything and i was not greedy about anything in my life but now i observe that, i am pretty changed and i know it’s pretty hard to say but I am very rude to the people who are around me. i want to do everything¬† quickly and fast and i am also get frustrated as well and i always thought i should change myself but than i keep myself cool for few hours but after that i got more worse than that but suddenly realize that i have done something wrong …… i think it’s become my nature.. please tell me what should i do to change myself and frankly said i want to become a good family person and healthy relationship in my life with everyone like at home and at work as well. So please help me with this.. please…