You sound like your feeling like a dried up well..and you have nothing to offer. To me it kinda sounds like depression. Depression isnt nessacarily all sadness. Depression to me is an emptiness..a giant void. When I went through depression, I felt like I lost my personality too, then I ended up having a nervous breakdown, to which there was no where to go but up. I stopped feeling so empty and started coming out of it. But it was after I hit rock bottom. If you are suffering from depression and make sure you get a diagnosis, go on medication..it may help..thats if your not already. Or read up on depression and see if it sounds like what your experiencing.