I actually have no idea what his policy about this is, or if he even has a strict boundary around this. We usually only text about schedule changes but I have texted him once to thank him which he seem to appreciate and once when I was having hard time and he did respond rather quickly which was helpful and even offered to talk later on but I wasn't comfortable using that option, I don't like to bother people. But I have a feeling he would be ok with occasional crisis call, not every day contact though. Perhaps something we should talk about just to be sure what his rules are around this.