The fact that she's texting you and not being up front about this whole situation tells me she doesn't want to put forth the effort for this relationship. If my girlfriend started texting saying she had doubts about us, I'd ask her to talk about this in person. Obviously, this is a big deal for you two and if she doesn't want to actually communicate about it with you and just send bullshit texts, she's not worth your while.

IMO, if she really cared for you she wouldn't be bullshitting with text messages.