把不好的方面放到后面来说。 要理解你的父母，他们可能会不开心。 给他们一点时间。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
If you know something about your boyfriend is going to bother your parents, don't start out the conversation with that. Instead, wait until the middle or end of the conversation to talk about it. For instance, if your boyfriend is older than you, you might want to hold off on that bit of news until near the end of the conversation. If you're going against your parents expectations of you, they are probably going to be upset. You're just going to have to deal with their anger and even tears, unti