Is it just me? Annoying boyfriend?

My boyfriend is away at college, so we are doing long distance (this is our second year doing it, so its nothing we arent used to).
My issue is that I always feel like I'm in the way. I try not to text him unless he texts me (although I always text him "good morning" or a random "i love you" during the day), and I only ask him to Skype once or twice during the week. Whenever we are Skyping, anytime he says "oh my friends want me to play a videogame" or "i think i want to go to the gym", I let him do it... even if we only Skyped for 30 minutes. I never want to be in the way of him living and doing what he has to do, especially when it comes to schoolwork and even playing videogames with his friends.
Am I wrong for always letting him go? I always want to Skype him and feel sad when I let him leave early, but I don't want to force him to talk to me if he doesn't want to. I've talked to him about how I wish we could Skype longer but I know he has important things to do, and he's always just said "its okay".
I guess its all my fault... hes done NOTHING  wrong. Or am I a really good girlfriend for putting him and his wants/needs before my own all of the time?