Would this be taking our best friendship too far?...?

me and my bff(we are both girls and 17)...have recently started..making out with each other and doing other foreplay..we havent taken the pants off and dont plan on it...we've been doing the same old same old for awhile and we want to spice it up a bit..how should we do that?. we dont want to take it too far...i was thinking whipped cream on each other and having the other one lick it off?..idk. ideas ? :/...but not too far.