As we started to see last week, Olivia's flashforward slightly depends on Mark's choices. She told him before that if he starts drinking again then their marriage will be over. Now we have seen her trying to get him to move away from L.A to change their futures completely but it looks like he has no interest in this.
There aren't the only factors though, Olivia gets to decide whether or not she has anything to do with Lloyd ever again and risk that she might fall in love with him. She is already attached to Dylan. :S I don't want her to be with Lloyd though