Vague messages and seeming like my girlfriend doesn't want to talk to me?

As many of you may know from my last question, me and my girlfriend have it had it pretty bad lately but she said we’re ‘single’ for the moment until the ‘old me’ comes back, like i said before. So lately I’ve been doing just that, doing many things that I did for my girlfriend like i did before such as making things for her, playing songs on my guitar for her, and buying things for her. I just seems like what I’m doing is not enough sometimes, whenever i send her something i made such as a slideshow or diligently drew her a picture that took me hours she just says ‘oh that looks good’ and sometimes not even thanking me for the hard effort i put into it. Also, everyday the conversations i have with her are just hard to maintain on her part, for instance, I’ll send her a 2 page text talking about something and she just says: ‘cool’ ‘Kk’ Yea’ ‘Alright’ and very vague messages. Also, in the morning i’ll send her a very nice good morning text and she just says ‘Hey’, not even calling me babe anymore and i pretty much call her that everyday. This has been going on ever since she declared we’re single for the moment and she says i’m still here number one guy and isn’t talking to anyone else, and also that she still loves me. And today, I could just feel like she highly annoyed or bothered by something because she’s doing the same vague messages and i asked her if she’s ok and she say she feels weird, then I asked her, “is it me or something i did?” and she said “Nah” but i really think something is wrong. I really want to tell her how she makes me feel when she talks like this and if she even wants to be with me anymore and i want to talk to her about face-to-face without here seeing it coming so she can’t attack me with BS. I know i messed up on her a couple of times and i’ve been trying to fix it every time, I still love her very much but i guess she only sees the mistakes i made. I just wish she would just stop throwing it in my face, anyways, what do you guys think?