One thing I noticed about Germans

One thing I noticed about Germans is that they are very friendly overall. I come from Asia and most of them seem friendly. However, I find that some people tend to ghost when our relationship goes wrong, when we fight, when we don't have anything to do anymore, or when we grow apart. As if nothing had happened, it was the same as before we first met. Some don't even talk to me or message me to see how I'm doing. I know it's not like that for everyone, but sometimes I find people like this and it breaks my heart