This.

Gah, not again! At least this time its a homophone and not a completely unrelated body part.

Ignore all the people who are berrating you for relying on texting. Technology changes and people get used to it, that's a fact of life and nothing to be ashamed of.

That said, you are coming across as a bit clingy and/or paranoid here. Believe it or not, girls aren't hanging on to your every word waiting for something they can get annoyed at, so you should probably stop with the constant worrying that you've said something wrong. Unless you are constantly putting your foot in it, in which case maybe you should stop to think for a bit before you hit the send button so that this sort of thing can't happen in the first place.

Also, Ratwar's advice is some of the best in this thread. Sit her down and explain to her calmly (without coming across as paranoid or untrusting or clingy) that you sometimes get worried when she doesn't text back, so could she at least say goodbye when you're in the middle of a conversation and she's about to do something which is gonna keep her away from her phone for a couple of hours. But that said, if you're texting her 24/7 maybe this is a sign that she wants a bit more space?

In any case, this is obviously something you're going to have to get used to. You mention past experience is what's making you worry - you need to remind yourself that this isn't any of your previous relationships, it's different, and things which were problems then don't need to be now. Constant texting isn't healthy anyway, and it doesn't do anything to build trust between people, so it sounds like you're better off now than you were. Get used to that.

I feel ancient. Beepers were the rage when I was in high school. It would have been weird back then for a couple to be able to stay in constant contact with each other, and relationships blossomed all the time.

Don't worry about it and don't come off as needy or insecure.

Yeah, that sounds about right. I'm surprised you remember that actually.

Start spending less time with your phone so you can kinda understand where she's coming from.

I told this to my wife, you know what she said. Why isn't he calling? A text is fine but maybe the girl wants to HEAR his voice and not see a lousy txt.

if your comparing her to your previous girlfriend[s] then your probably not ready to start another relationship

Let her have her own time. There was a time before you could go through the day without hearing what someone did each minute.

Longing makes the heart go fonder or something like that. You'll miss her more and be that much happier to finally see her.

I think it's more likely that she's simply busy. In which case neither text, nor a call would help. If anything it might freak the OP out even further to know that she's not answering his calls, though the reason may not be something to fret over.

Like I said before, just give her some e-breathing room.