My bf is going to Japan for 10 days, is it wrong for me to feel sad and lonely?

Im happy for him, its a mini guys trip. He’ll only be gone for 10 days, i moved in his house recently, weve been together awhile. Im taking care of his 3 dogs. I didnt go because of my work and because well its a guys trip and i wanted him to enjoy that. Well now im lonelyy. I just dropped him and his friend off at the airport. Theres a 17hr time difference. Im sad we cant cuddle. I didnt want to be all crazy clingy when he left, because he seemed so so excited to go and has been talking about this trip for months. I just am gonna miss his cuddles and kisses :-(