Dad's return

Dad returned on Apr. 8,his 60th birthday. Total 10 years he spent in the country that was hot all year long. I guess I only meet him 3 or 4 times during these 10 years. It is great that he has been back but why I am still a bit sad. I don't know why we both desire to explore till we become exhausted. I feel a bit tired but I can't stop. What I need is just a break and some hugs.