alone

Does anyone feel ALONE?? Why? Do we need to be alone.. to think? Does being ALONE make us lonely? ALONE, what is it?
Sonetimes, i just feel alone.. don't know the reason why. Many thought are coming out. But the more i think aout it, the more i ask myself, "Am I really alone?" Then, the picture of my family and my friends would just pop-up saying, "You're not alone. We're here." I guess I'm just over-thinking about myself being alone.