Ipod 4th gen not really connecting to wifi

My ipod 4th gen has always worked fine a day ago out of the blue the wifi wasnt working but then i relized it was my ipod it only works when im right next to it as soon as i walk away it disconnects i have tried everything to make it work disconnecting the router, the dsl cable, resetting the network setting,to turning off and on my ipod everything else in the house connects fine i dint know hat to do anymore and i really dont want to reset my ipod so please can i get help