Why won't she talk to me anymore?

Ok so there's this girl I like and we've been talking since the beginning of summer. She's a freshman at my high school and I'm a sophomore. She knows I like her btw, but we text alot and we used to talk in the hallways between classes too, up until last week Monday. She just stopped answering my texts and talking to me in the hallways. I know she's ignoring me because I have an iPhone and it shows in the conversation whether she read the message or not, which she does, but she never responds. And she takes different routes in the hallways so we don't see eachother hardly anymore. I'm always really nice to her, and we joke around but I never take things too far or say anything remotely offensive… The only thing I can think of is that I know there's another guy that likes her and maybe she likes him and she doesn't respond to me because she knows I like her and feels guilty that she likes the other guy because she knows it makes me basically die on the inside. Only thing I can think of. Please help, I don't even care if she is with the other guy at this point I just want to at least talk to her and at least be friends.

She has found someone else.
She is a coward for not coming out and telling you instead she chose the easy route of just ignoring you which makes her a coward.

You're smothering her. Back off for a little while and give her space

I really think you should talk to her in person and ask her what's up. Ask her why she stopped talking to you all of a sudden. Don't text and ask her because she can easily ignore your text or stop texting her for a while and she'll wonder why you aren't texting her and she'll text you again if she really cares.

Please answer my question