Milos relationship with Kinsey and other characters

In the first half of the play in act 1. Not all characters are onstage. In fact Kinsey and Milo are offstage until the entrance on page 18. During this time it says that George and Kinsey are outside waiting for the entire time. This clearly showed me that milo can put up with Kinsey. Which means there must be some kind of understanding between the two characters. Despite attacking Kinsey during milos crazy outburst. Both milo and Kinsey at the end of the play both decide to continue on with the performance. Which also establishes a small friendship. 

Kinsey is really the only friend milo has. His relationship with the other characters is really poor. He tends to personally dig at each character throughout the play and I think he just doesn't like anyone or wants to be a part of anything.