Alternative explanation for a grand cross in friendship composite chart?

https://imageshack.com/a/img921/1025/gqCa26.png

This looks really painful to me lol, but the thing is it's between myself and my best friend of 12 years. We rarely bicker and tend to get along harmoniously, and we're roommates so that's weird. We've had one big fight, but we recovered from it very quickly given the circumstances. Honestly I probably get along more harmoniously with her than with any of my other friends.

Is there something else the grand cross could mean other than conflict?

How does the synastry between you and your friend look? Synastry and composite are quite different things.

For the dynamics between you, look to the synastry chart. The composite chart doesn't show your interpersonal dynamics, it shows what is created from your relationship--in this case, what your friendship creates.