lonely feeling

recently i fell lonely again....i really dont like this feeling...hate this feeling but i dont know why this feeling keep on attack me?is this one of my weakness?why human must have a lot of feelings?why dont human just feel happy all the time?human sometimes having some wierd feelings and they dont even know what they actually feel....wierd right?human do feel happy, sad, lonely, tension, angry, and etc... *listening to akon=lonely* *love it*