All the EVS in Kalamata have to live with flatmates either 11 either 7 (depending of the house).
This is something positive because you will not feel alone, especially during your first weeks when you're nothing but lost and dizzy. Sharing your flat is also an opportunity to discover other ways of life (type of food, eating time, daily habits, musics...). You have people to talk to all the time. If you want to go out there is always someone who will be happy to come with you. Watching movies all together, cooking, sharing food, morning talks or fascinating late nights talks...are some examples of the positive side of sharing your flat.
Living with many other people requiere communication, cooperation, be careful to respect the others' rights, dealing with differences.... Many skills you will improve during your time here.
But living under the same roof can be tough. It might drive you crazy for numerous reasons due to yourself, due to the huge differences between each others, due to *fill the blank with your personal experience of flatsharing*
When there is an umbalance between all the positive sides of this way of life and the negative, when the negative are making you forget the positive ones here is something that might help you (it worked for me):
Take a deep breath, watch these talks and enjoy again the community life ;)