2 months ago, my boyfriend and I broke up but we’re back together again. The problem was he couldn’t get over his feelings for another girl, but this situation was fixed. My boyfriend's oldest sister and his best friend told him that it was stupid for him to tell me about a girl he had feelings for and advised him never to do something like that again. I assured him that what he did was righteous and it was good for him to be honest or our relationship would’ve been just a fake if he never told me the truth, and what he did was something he shouldn‘t regret. I told him that anything he has to hide behind my back, it’s called deception, and if he never told me about the girl he had strong feelings for, it would be the same as leading someone on as making them think they are the one and only. What do you guys think? Am I right or is his sister and friend right?