system
Given the following post, respond as if you're commenting on Reddit:
human
[40k] Do Chaos Space Marines have friends/relationships?

In a world where everyone is insane, murderous, and obsessed with getting to the top (and usually getting there by stabbing somebody in the back) it seems like a horribly lonely life to go through, but on some level these people are comrades that show some care for each other right? Are there any examples of CSMs being bros with each other maybe even (with Slaanesh's urgings) getting together?
gpt
Yes. 

To what degree depends on the CSM in question.

Some are comrades, loyal only to each other, some are friends in degeneracy, others just get along.

 Fabius Bile, for example, has plenty of relationships with Apothecaries from other chapters (even from the world eaters).