I will go ahead and assume that you absolutely know he is lying to you as opposed to suspecting he is lying. Unlike previous answers, I do not believe that someone else lying can ever be blamed on someone else!! Absolutely emphatically not. read more
Talk to him with facts in your hand about occasions you know he has lied to you to increase your chances of getting an honest answer. Give him a benefit of doubt before assuming the worst. Once you have your reason for his lying, then the steps can be taken from that point on. read more
But if your boyfriend is lying to you a consistent basis, you should identify when he is lying, think about why he may be lying, and respond to his lies in a clear and honest way. If you boyfriend continues to lie to you, even when you confront him, you may want to consider if there are issues in your relationship that are bigger than just a few small lies. read more
But if you have a friendly relationship with your ex and you two talk once in a while, you should fill your boyfriend in. Yeah, it might make him a teensy bit jealous, but lying about it isn't going to make anything any better! If you lie and he finds out, your innocent friendship is going to seem extremely suspicious to him, no matter what you say. read more