It's only hard to find compatibility.
That's one of the reasons for this forum. We all have something in common.
Bipolar is very tricky and doesn't manifest the same as say a depressed person who's only thing is depression.
Then friends require energy. We don't always have it to give.
And consistency. We bipolar lack there too.
I'm still friends with people that were in my life 30 years ago. They'd do practically anything for me and I for them.
Do you see where I'm coming from?