it happen to me many times to feel empty , to see that there is no point on living ... but we cant just give up on life because of some moments of our mental/psychological weakness... you dont need a goal in life to live it just enjoy the time passing and don't overthink about your existence
To be honest, if I didn't force myself to stay busy with various projects, I would feel empty as well. I suppose the best advice would be to keep yourself busy.