Never ignore a girl's text! It's the worst thing you could do, this sort of thing isn't a game, if you're not interested in her, don't drag her along with you and if you are reply (I'm not saying as soon as she sends a text but at least every few hours). I recently just broke something off with a guy because he would talk to me and then just go silent for a few days before I'd have to text asking what's wrong, this happened four times until I had had enough, girls don't find it attractive when you don't reply, we don't like being messed around because believe it or not, we are humans, not prizes to be won.