Hey!
No, just because she's not texting you back does NOT mean she doesn't like you.
Some people are not really into texting (including me). They think it's better to call or talk face to face.
However, there IS a chance she's not as into you as you are into her. Like I said above, I'm not really into texting But if someone I like (friend or otherwise) texts me, I usually text back as soon as possible- with a good response. I hate to say this, but she might be finding it annoying that you're texting her often and regularly. Or she might be playing hard to get.
I suggest that you ask her directly, in a playful way
Hope this helped!