I feel like I don't listen to boyfriend?

So we have been dating for about 4 months. Picture perfect relationship, we are best friends and get along great. I went away to college 5 hours away and we still manage to stay really close and see each other every couple weeks. I couldn't be happier, but sometimes I feel like I don't listen to my boyfriend. He listens and remembers the majority of what I say and it's really flattering to me because I know he's always listening. But sometimes he will tell me stuff and it kinda slips my mind and I feel like I don't always listen to everything and all the details and stuff. I feel really bad and I know he probably notices and idk why I do this, lately I've been trying really hard to listen but it's still happening. Our communication basically consists of texting and facetiming right now so it's even harder but he still manages to surprise me by remembering little details. He tells me how happy i make him but i feel like a bad person. How can I be more attentive and a better girlfriend?