to be in touch with, to stay in touch with (somebody)
When you can make contact with somebody, he is ... in touch with you, and you are in touch with him.
about my favorite
How to find a Pen/Chat Friend in Germany?
Frankfurt a.M Deutsch/Englisch Freizeitaktivitäten
German series with subtitles
LanguageLearningBase.com (short: llb.re) is an online community for learning foreign languages.It represents an open knowledge base. Every member can share and gain knowledge about a new language.