i love this movie, are the real abba still alive?

Yes, they are. The women don't do any public appearances یا stuff, though.
Benny and Bjorn, the two guys, helped produce
(Among other things they did for it) the movie Miamma Mia!

yep they all are
but one of the women went into hiding from the press
cause they used to be 2 couples, and when the couples broke up, the band split

yes abba is still alive

yeah they are, i don't think they perform now anymore though.

Yes they are, but they dont interact with each other very much, if at all. all i know is:
Agnetha Faltskog lives on an island outside of stockholm called Ekro and doesnt دکھائیں herself to the press
AnniFrid Lyngstad lives in Switzerland (I think in Zermatt but im not sure)
Benny Andersson still continues with his موسیقی career and owns the theatre that Mamma Mia! premiered at in stockholm
Bjorn Ulvaeus recently lost his memory and cant remember winning the eurovision song contest in 1974 (Sad)