Relationship with 2 years difference in Washington

So I’m dating this guy who just turned 17 years old and I’m 15 years old. We just had the “talk” about what will happen when he turns 18. He’s afraid that he’ll get in trouble if we keep this relationship and if we do... you know. But since we live in Washington, the code of conduct said when you turn 16, you could have “any type” of relationship without it being illegal.

But my boyfriend doesn’t want to breakup with me or anything, he just wants us to be cautious because he doesn’t want either of us to get in trouble. But honestly the last thing that he wants to do is break up with me, I quoted his words. I’m just kinda confused on what to do, I don’t want to lose him.