my bf (M17) is going to clg and im (F17) can't help but get anxious

so my bf is gonna start his clg in 2 weeks while i complete my final year of hs. we've been dating for a month now but have known each other/had a thing for 1 yr now. fortunately, hes not going away for clg and is gonna stay. im js rlly worried and anxious that we'll drift apart. i like him a lot and want us to try as much as we can. ik his life will get busy and no one can stop that, even ill get busy w my final year exams but im still pretty worried. i have talked to him about it and he always says how he'll make time for me and him getting busy is inevitable which ik is true. ik ppl change after going to clg too but still. is my concern valid? we r rlly rlly close emotionally and have a great connection so communication wont be a problem as long as hes willing to communicate aswell. what can i do honestly?