I've followed this thread from the beginning, and I have to say that it disturbs me a great deal that someone who has taken a cavern class would seem to be so unperturbed about diving with someone who is described the way the OP has described her buddy: "Risk taking", "self destructive behavior", "inattention", "lack of communication".
On the contrary, I AM concerned, which is why I asked for advice. When I took all my courses, they were one-on-one, and I've only had this one particular buddy to dive with every time I dove. Even the recreational ones were done with just him off shore in Bonaire; never with a group or other people (other than my instructor). I wanted to know what other people knew about the area and type of dives that my buddy planned to make an informed decision on what to do. I have decided that I am not going to do anymore dives with him unless there are other
people along. I just found this site the day I opened the thread and have learned a lot. I'm blessed to belong to a community of people willing to share their ideas and opinions and offer suggestions to help others.