People going after my BF

Okay so hear me out my class was in spain for a week ( I didnt go) and while that random crazy stuff happened like a boy got his first kiss with a spanish girl but even more crazier there are 2 Girls crushing on my BF. He knows it too already and those 2 girls know he is in a realtionship and i mean it wouldnt be so bad and i wouldnt mind.. but they dont even care about the fact hes taken. WHY? Not only those 2 Spanish girls also a girl in my class and 2 of her friends one grade above us. They all know hes taken and still try to get with him. The funny thing is they dont know its me tho, so when one of them starts yapping about how handsome he looks its always kind of weird? My Class knows nothing about us beind together but a friend of mine told me that at their flight to spain they were all planning to make us date... which we already are and idk its just funny and i wanna see their reaction when they find out. But for now we keep it a secret since many people wouldnt like us to be lovers.