Yes we have, sort of. Finland was colonised and belonged to Sweden for 600 years, until we essentially lost it to russia. After the russian revolution Finland was independent.

Swedish influence was a big part of Finnish history and I’d like to think that our relationship has been very good at least since after the Finnish civil war and through Sweden coming to Finland’s aid during WW2.

In any case, if you want our troubled relationship that has been anything but nice - look west, to the bloody Danes!