She's never going to feel secure as long as you are indecisive. That's a fact. Maybe how upset she gets about it is something that can be worked on. Does she have anyone to talk to but you about the fact that she has to live with your indecision now? It's hard for you because you are trying to feel closer by trying, but she is afraid that you are going to draw her close and then D her. That's what it seems like might be going on.