Should I bothered by the way she texts?
I guess it depends. Why would her texting bothers you?
I don't like that she uses so many emojis.
It's fine to dislike how she texts, but you shouldn't say anything about it to her because it would be rude and annoying of you. Just accept that she uses lots of emojis when she texts and try to look past it.
Why should I? She uses emojis as a method to express her self but she don't know that I can't stand them. She's disrespectful.
Why don't you just tell her that you love her way of expression, but can you go easy on the emojis? Also, say that it feels like you are talking to a kid and ask if she can do you a favor by using it a bit less and that you would appreciate it. I think she will probably be cool with that.