The Composite chart of a 10-year old friendship.

Below is the composite chart of me and my bestie whom I have been close friends with for nearly a decade now. Despite all the horrible stuff we've been through, we're still going strong. I was always curious what made us cling to each other. We're both terrible with people in general and tend to be rather apathetic. We both struggle with creating emotional attachments to others. So how come we're attached to each other?

What glues us together, astrologically ?

I'm in blue (Sag Sun). He is red (Gemini Sun). I added the synastry for those who want to take a look.