I have that sinking feeling in my heart

Im pretty sure that my relationship is over. I feel sad that i gave 6 years to a guy that just doesnt care or at least care anymore. Im sad that i am losing the person that used to be my best friend and im sad to lose the amazing little child i have helped him raise. I put so much into our relationship to make sure that we were always taken care of and i havent gotten much back for all my efforts. Im just so hurt at the moment to think that all of it was for nothing for it to just end so easily after 6 years.