Many thanks for your answers.
The question, I wanted to ask in horay (and didn't because of the extremely late ASC) is already answered.
The situation looked quite negative at the moment, my very close friend made some shocking accusations, so I was worried the friendship could suddenly end. The opposite happened, after 4 days of intense talking, we got even closer than we already were. And it seems, it had a big positive change as a side-effect. One day after we returned, the person, who was trying to cause conflicts between us since last March, gave up and left. So I kept my friend and lost my enemy, a much more positive outcome, that I could expect
But maybe it has also to do with the transits, we currently go through. I have ASC/Sun/Venus/Mars conjunction in Cancer and my friend has DSC/Sun/Mercury/Venus conjunction in Cancer conjunct mine (all planets at 5-11 Cancer). We got in synastry exact conjunctions ASC/DSC, Mars/Sun, Sun/Venus, Venus/Mercury and the transit Uranus/Pluto square is affecting us together with transit Saturn in Scorpio and transit Neptune in Pisces.
It seems transit Pluto just moved from opposition to our Sun/Venus to opposition to our Venus/Mercury. It are the last planets of our conjunct stelliums.