Age of consent?

I'm in a ldr with a guy who's 18. I'm 16 and my dad is supportive and okay with it. My question is, the age of consent where I live is 18, but it's 16 where he lives. Would it be illegal to send explicit messages or pictures to each other even though where he lives I'm legal to be with? If it is illegal, I won't put his future at risk :) Thank you!