Why is life so lonely? Can being by yourself be called freedom or lonlynes?

I am a 21 year old male, 6'4, wear glasses and have a good paying job for my age. I drive a nice car, no debt and I am not scared to help others. I don't feel like I am struggling in any part of my social life and have a lot of friends but I feel alone. I have no one to text good morning or good night. No one to ask how my day was and no one to vent to. I can't understand how I have been basically single my whole life. I try and make the effort to get to know and understand the other person but all I am seen as is a good friend. I am mostly being used like a bandage, I heal and help prevent further pain but when all is said and done I am thrown away. I don't understand what I am doing wrong. I don't know if I will ever be able to find someone that loves me back and someone to call my own. If you have any advice please tell me.