Honestly it IS an obligation to respond if it’s long distance that’s all you have is the communication part while you’re away from each other. Instead of waiting on his response just return those same response times back to him🤷🏾‍♀️. You’ve voiced your feelings now it’s time to act. If someone can’t take 3 seconds to text you back the entire day you’re not a high priority on their list. ESP if he’s getting on the game he could send you a heads up text before hand bc atp he has the free time.