I would rather hurt you by telling the truth than cater to you with lies,even at the risk of separation.
cater做“迎合某人”解时后面一定要跟to或for,楼主可查字典,hurt you by honesty totally chinglish,句子结构有问题,已经有I choose the later,怎么还有谓语cater和hurt,全部变成ing形式.