Why do I feel this way?

I've always wondered why I felt a certain way. I've always felt empty, like there's something out there for me but I have no clue what it is and I can taste it but it's not there. I've always felt this deep feeling of loneliness and I don't know why. I feel as if there's this void within me that nothing can fill. No one in my family died or anything and I've had no trauma.. I'm just.. Empty. I just realized that I've felt this way for years, almost 7 to be exact. I feel like it started when I moved to a different city about 20 Mins away from my old one. I moved and left all my elementary friends behind and to a new middle school.. But shouldn't I be over that? I'm a college freshman now. Why do I still feel like this? There's a void in me and idk what it is???