saudade

"Although named by the Portuguese, saudade is a universal feeling related to love. It occurs when two people are in love, but apart from each other. Saudade occurs when we are thinking of a person whom we love and we are happy about having that feeling while we are thinking of that person, but he/she is out of reach, making us sad and crushing our hearts. The pain and these mixed feelings are named saudade." - wiki