Whenever I send texts to her she doesn't respond, but I respond promptly to all her texts. I sent her a text the other night about a concert and I could tell she went online immediately (through IM), but she never responded to my text. I considered her my very bestest friend until all this started to happen in the last few months. I don't have many friends and don't want to lose a friend, but I'm not going to put up with this any more. I asked her about it in an email and of course she didn't respond. So I've kept communication with her very shallow and light and am going to phase her out. Why would somebody do this?