The clear clues are here, you are injured and he doesn't want to help you and even increases your workload. This adds up to a man that will never help you and will sit and watch and maybe even privately ridicule you to his friends and family. If he doesn't want to help you with a sprained ankle what will be his role during a pregnancy, childbirth or raising children? You want to sell your dignity just to have someone to go on holiday with? Better find someone else to go with, dump him the day before you go and start a new life feeling stronger and better about yourself.