I have, yet again, realized that I am different from most people (in my life). Latest difference being that I do not require people I like, to get along with each other. I have noticed that most people (around me) have the need to make sure that everyone they hang out with (or like in general) like each other back. For example my friend would want me to get along with her husband, my husband would like it if I got along with his family, my family would prefer it if I got along with all my relatives, my relatives would be elated if I got along with all their relatives ... may be that's bit of a stretch but you catch my drift.
I, on the other hand, am totally fine if two people I am extremely fond of, are not fond of each other much. I have no need for my girlfriend to get along with my husband, or my husband to get along with my family, so on and so forth. It is great, if they do, but they don't it doesn't bother me.
The least I expect from people (in general) is to be civil and well-mannered no matter who they are and whom they like (or not). After that I do not really care to indulge in their personal dynamics with each other. I like giving people their space and letting them make their own choices about whom them want in their lives and/or don't. I do not think having me a common link should be a punishment for anyone. The only relationship they need to focus on is with me. Anything else is not necessarily my concern.
However, so far I have been a minority with my way of thinking. It does help me stay sane ... and always in my lane.