Aimless

When asked why I wanted to do the idea I am doing for my dissertation/major project, I couldn't answer. Or more like I couldn't think of an answer when put on the spot, which lead to me being asked why am I bothering..to put it simply, which then lead to me becoming even more unconfident about it and not wanting to bother at all because obviously there is no point working on a project about a subject that is too damn hard to research. I have zero motivation and I don't know how to get it back.