Hello. Well, if you havent left yet, maybe arrange to meet him to take it to the extent you want it at? Dont feel bad to call him, maybe he doesnt have credit on his phone to contact you, i used to always call the boy i liked. You should call him and arrange something and say good bye for those three weeks. when you come back , as soon as posible you should call him to see how he is and tell him how much you missed him