My play doesn't change much when making friends or playing with the same group of people at the table. It all comes down to repetition and strategy. De-sensitizing yourself to money is also the key. If the money you are playing with means nothing to you whether you are in a high stakes or low stakes game, with friends or without friends, you will play the same game. I played semi pro online poker for years in addition to 2 weekly live games and a "friendly" low stakes home game. I notice no change in my game however it did take time to get to that level