so the EASIEST way to get all endings is: make sure you bump into a crying lil guy outside the cab, then talk to everyone completely, but do not do any of their endings quite yet. save a lot too, there are TWO people you can flirt with where one will BREAK the true ending (this was on purpose) and the other will give you an ending too hehe.
once you met the lil guy, talk to everyone, don't flirt with just two of em (you'll know who if you try them) then you can get the true kennding, as well as reload and talk to ANY character a second time, and "settling down" etc means ending the game with them.
one ending is also simply leaving the cab early, or not going in at all.
have fun!