I'm kinda feeling sadder and sadder over my bestie. We were so close and she was one of those friends that never abandoned me. But now, I don't know what's happening. We usually don't talk much but that was something normal as we knew that when both of us were feeling like talking it could last hours and tell everything that the other missed. But now, I realize that she's not telling me as much as before: today for example I discovered that she wants to be a member of the student council next year and that was decided like one month ago. She didn't tell me anything about it. When I asked her about it just like to start one of those long conversations that we had, she just said "I don't care, that was only for the curriculum". I tried to keep up the conversation but she was only getting offline and then online (to answer) as though she didn't want to talk. That's not the first time that something like this happens. It's just as if she doesn't see me as someone worth talking to, and I'm supposed to be her closest friend. At least one of the closest. Maybe I'm overreacting because she has some kinda depressed moments where she just feels some kind of tingling (according to her) inside her that just put her in a nasty mood and she doesn't feel like talking to any human being and that may be happening more frequently. But that's it , she doesn't tell me anything about it, it's been so long since we had a real talk. And sometimes her answers are so sharp that I just feel like she hates me. I don't know if I should talk to her about it or not because maybe she doesn't feel that way and she'll just get mad.
Can someone help me with this please?

You should definitely talk to her about this.
Communication is the key.
If she will just get mad, honestly that will mean that she isn't worth it.
I know that she is a close friend of yours, but that's not an excuse to act immature when someone is worried abt u.
So.. yeah, ask her an explanation.

>>1 Friends don't have to tell each other everything about their lives. You're more likely to push her away if you press her for information. She would feel like she's being interrogated if you did.

Give her some space and get back to her later, maybe with a different topic.