Abroad with SO recommendations

Hello! This is an extremely exciting post for me. My (22M) GF (22F) has just recently told me she wants to get out of her comfort zone a bit and travel with me. I am so unbelievably excited, and my thoughts and ideas have been racing. With that said, I need some recommendations on where to go. For context, we have between 6-8 days, and would be flying out of Boston, Massachusetts in August.

I have been across much of Europe, with the exception of some heavy hitters like Portugal, much of southern Spain, Italy, Norway, and Greece. I have done a lot of that solo though, and now that she wants to come with me I am not sure of what would be a more romantic, couples destination. I was thinking the Croatian coast (Split down to Dubrovnik and maybe into Montenegro), Porto and Lisbon, Costa Brava in Spain. She wants to be by the ocean, and that’s pretty much it.

Let me know what you think!