One thing I have learned is : all chicks are different when it comes to texting and contacting !
I'm dating four girls right now and one is texting me about everything that's happening with her,another will not text me for 3 days but when I text her I just ask her to hang out and she'll happily agree. One girls wants your attention always, other girls are busy or just not so big on texting all day , every day.
I would just directly ask her out: Hey , when are you free to get together,I'd love to see you. Let's make dinner at my place, you need to bring the wine though

( smiley is optional)
Either she says yes which is good : Have a good time ,escalate naturally and hook up with her. It's really that simple. Stop waisting your time and be a man. If it was up to you you would have slept with her on the first date.
If she says no: perfect, on to the next one. Lesson learned: you should have escalated earlier.