1. Utility-- friends in so far as you are mutualy usefull to one another. this friendship is easily disolved if one no longer deams the other useful
2.Pleasure-- friends in so far as you mutualy attain pleasure from one another. this friendship is easily disolved when pleasure becomes absent
3.Virtuous-- friends because you have similar virtues, you see the world together on the same wavelength. you wish them well for their own sake of well being. these are your best friends, and will be for close for a long time