another way would be honesty!
If u just talk about your relationship and u'r feelings u will fell more free an understood.
And don't be afraid, u'r friendship will break up. That's what so great and sedatively about real friendships: u can talk about erverything including u'r personal problems. And as u said, u'r relation seems to be very good.
So Talk to her in a calm moment...
that is my advice