Alphabet Dating: How to Save a Relationship

I had a feeling that my relationship was ending, but instead of accepting it, I decided to throw a grand romantic gesture. He dumped me the day after. So the question is, if you know somebody's going to split up with you, will romantic gestures work? I just think it'll prolong it. But before it got to that stage, remind them as to why you've sort of fell in love with each other in the first place.