I've never critiqued a portrait before, and I mostly do landscape work myself, so let me preface this by saying that I hope what I have to say here isn't completely full of crap.
The thing that I really love about this photo is the pose. Often, during my teenage years, I'd lay like this when I just felt like being alone and pondering life. I'm not sure why, it just seemed like the right thing to do at the time. In this photo, it is used in conjunction with an interesting composition, natural lighting and a stirring title to create a mood of disillusionment and dejection.
Placing the camera close to the ground was a good choice as it helps bring your face into view, and it reinforces a bit of a theme you've got going on with the floor. Your arms are on the floor, your eyes are on the floor, and it seems like your mood is on the floor too. You have the half-completed outfit of someone who just doesn't have the motivation to get up and do anything useful. I'm not 100% sure the boots fit in with the rest of it, but I also don't believe I'm qualified to question such outfit choices, so I won't dwell on that one.
My only real issue with this photo is the image quality. You've opted for natural light, which I do like. The wide-open aperture is also great, creating interesting depth of field, but the 1000 ISO has left the image quite noisy. Sometimes noise can add an interesting element to portraits, but personally I don't think it fits this one too well, and I think some noise reduction during post-processing would have been a benefit here.
That said, I still love the image you have created here; very moody, a little bit sexy, and quite unique too. I'm sure self-portraits aren't easy to do - especially not in poses like this - so I commend you on a job well done!
The picture does convey a interesting concept/meaning. Yet, it is still hard to find the true purpose. The title - Made her believe - does not answer this question and we are stick with incomprehension. So, we look at the model. She is gorgeous, yes, but this shot stresses an non-common place of her body. I mean : The face of the model is hidden by her arms and hair and if we can guess that she is looking at the camera, it does not really explain why she is in this position. The light does not push us to seek for her face but her ass and shoes. And there is - I believe - the true meaning of the picture : we can see a real contrast between the nice shape ass in blur and the shoes with sharp metals. Yet, if the picture put us in a strange questioning and make us feel daze looking at the model's ass, we still wonder "what does he mean by this f***ing title ?"
One thing I've noticed about giving a critique on this site, (and this has absolutely nothing to do with your image, but I just happened to notice it). The critique window only shows part of the image. I had to go back and forth between different open windows to make sure I had covered everything as fairly as I thought. An issue for the site to consider.