I googled this Prince Boris and he's very cute. But they might just be friends even if he is not gay because he grew up in Spain and she studied there for a short time and speaks Spanish. His mother married a Jordanian prince so they probably see each other at these big royal events like the wedding of Hussein and Rajwa. Not to say a romance can't come out of it but it might be just social swirling in the same circles.
Apparently their parents also have a friendly bond.