when ever I am answering my mobile or taking ex girlfriend out to my friends I start and stay all the time speaking English even my mates trying to talk my language I answer back in English, since many of my ex girls were English.

Cause I feel the same when I meet other nationality girls and they start talking in their language, so my rule always speak English if there was any companion who speaks only English it is fare and no one get bored or left out besides I live in London and speak English always.

Well it was not long relationship you should squared it up with him and let him understand fully your frustration and anger so that he respect your wishes in future if he really loves you he will be back other wise write him off, too many good men a round who can speak English and respect your views.

I think he was joking.

Not a very funny joke, but there you go.