A great way to judge whether you're ready to sleep together is to see whether your date has paid attention to things that are important to you. For example, remember when you told your date about the big works meeting you were worried about? On the morning of that meeting did your date text you to wish you good luck? If they did, it shows that they care about you and that they aren't just looking for a quick fling. It's the small but significant things that matter the most.