handle a new affair

hi
this is abt me and my gf.
before we actually been in a serious relationship we have been in a same group of frnds. all of us used 2 hangout togather and have fun. now me n her strted feeling more thn frnds and i proposed a month ago nd evrythin wrked fine. now d problem is we r still thr in same grp and d grp is unaware abt some intimate relationship between us. now we use to go on dates and walks alone.
so how do i reveal abt my relationship to d common frnds and keep same frndship wid othr frnds?

plz help!

:oriental: