I feel like my best friend doesnt want to be friends with me anymore?

last year, we were in the same homeroom and thats how we became best friends. but this year, shes not in any of my cles, so i only get to see her at lunch. last year, we used to be constantly laughing, now theres nothing to talk about. and whenever i try to IM her, she never sounds like she really wants to talk to me. and today, i was like basically narrating to her what was happening in zelda[the game i love] and she was just like "i dont really care about zelda at this moment" and it made me feel like she doesnt care about what i have to say. and she kept giving me one-word answers.