Terrified he might leave me

I'm leaving for a school trip to fiji for two weeks, he doesn't seem to even care it will mean not seeing each other or even talking. We are used to talking everyday and seeing each other every weekend. But he doesn't seem to care and he's mentioned that he would rather be with his friends from now on than with me and that I ask for too much attention..which I don't understand as he's always the one to text me first. I'm just scared when I leave he will realise he's better off without me💔