Loving the game so far, but i lose Rebecca's path after giving her flowers. anyone know why?
Yeah I did the same mistake during my playthrough and since my subs on youtube wanted me to achieve the harem ending I had to replay the whole thing... You need to score 9 points (6 since giving her flowers gives you 3 points) with her, meaning you only get to miss 1 point up until that moment, I missed by 2 points.
He's right, you needed more affection points with her at that point and there was only a small margin for error. Either accept the loss or go back and try to make things right. You should probably go through the offical walkthrough and check all of Rebecca's decisions to determine how far you need to go back. The official walkthrough is among the game downlads.
I had a similar dilemma and decided to make a guidance mod some time ago, to end the fomo once and for all.