Is my (ex) best friend being too immature for me to forgive her?

So me and my best friend of about 4 years are both seniors. We're both heading off to different colleges next year and senior year both of our lives just kind of started to inevitably drift apart. I got a job at a radio station and she got a job as a cashier. I mean sure I still made an effort to hang out as much as possible but it's kind of hard when we both work all the time and still have school and sports to worry about. So she sends me all these hateful text messages telling me how the reason we never hang out or talk anymore is because I didn't want to. That was completely random and not true and I just don't really understand why she's so upset. She hasn't talked to me in like 2 weeks, she blocked me on facebook, she's totally blown everything out of proportion. I mean I know we don't hang out like we used to but we're both 18 now and have a little bit more responsibility. I think a reason she could be mad is because my other best friend and I spend the most time together. But it's not just us, when we hangout, it's a whole group of people. And I actually happen to like being around those people because they like me and accept me for who I am (unlike her sometimes). She has another group of friends too but they won't hang out with her now. So all she's really got is her boyfriend. I mean, am I wrong for thinking if she has a problem with me she should specifically tell me what it is and what I can do to fix it. Because I don't have a problem with her. And I asked her what she was so mad at me for and she totally just started rambling on about how I'm such a bad person... lol. Now she's treating my other friend like crap too. Is it just me or does she have some serious growing up to do before I can try and talk to her? And advice, your input, whatever! Please help! Thanks! :D 10 pts to best answer!