I don't mean to poke fun at you, but honestly this is not that big of a deal lol. It makes me sad for you that previous relationships have failed because you think you ask too many questions. What's wrong with asking questions? We live in a digital age right now and the immediacy of texting and social media responses is something most of us expect. It's also worth pointing out that she may just find it easier and more comfortable to talk via texting. For me, I am quite the texter, and my BF and I like phone calls and texts. We typically say good morning & good night texts or phone calls, and we will text random things through out the day. I think most people like getting a text from their SO because it shows them you are thinking about them. It doesn't have to be some grandiose, Shakespearean type of message, but just a short, nice little message that says "hey, I was thinking of you and thought I'd let you know". If I find something funny online, I will text it to my BF, or sometimes if I'm feeling affectionate and sweet, I'll say something like "hey, I just wanted to let you know how much I appreciate you." or whatever.
I think you are placing too much pressure on yourself to be perfect, and nobody is perfect, so you should get over that. If your girlfriend likes you, she won't be caught up in what you ARE saying, so much as what you aren't saying (as in, if you don't reply because you're worried you might say the wrong thing). The more you text, the more comfortable you will be with it. Try to relax and have some fun with it!
"Caring is not an advantage."