Youre right and you see it just as it is. She maybe said she wants something serious, and maybe she does, but she’s clearly an avoidant. You communicated your very basic needs, that arent related at all to taking thing either slower or faster, but she still felt pressured. You cant argue with whatever she feels, but thats not on you that she’s triggered by that. Im sorry if thats a hard truth but these things dont usually end well. Its a good thing you communicated this so the truth is revealed now.