My advice (which I haven't taken myself but hey, we learn from our mistakes... eventually) is to not go overboard and bombard her with positive messages or respond to short texts with long rambling ones.

I tend to do this. To overload the other person with unreasonable flattering comments and expectations early on which is obviously just setting things up for a crash when those sentiments aren't returned.

If someone likes you then just chat with them at their level and keep things light. I tend to get waaay too intense too quickly and it probably just comes across as needy, unattractive and false.

I kind of wish text messaging hadn't been invented as, for me at least, it encourages my worst excesses. If I set one rule for myself in relationships it's to tone down the texts as that's where I do most damage. Many's the time I've sent a text, regretted it and then wished I could recall it - When I'm talking in person or on the phone, my natural inhibitions and instant feedback from the other person tend to keep things lighter.