Julia, you're making a lot of assumptions. First, if a person tells you intimate things openly, it doesn't necessarily mean that they are falling for you. It could equally mean that he's just one of those who 'over shares'. Second, if a person isn't in a position to text, it doesn't mean that they are pulling away. He could very well have been doing something which he didn't want interrupted.
My best advice is this: gauge his interest by how much face to face time he wants to spend with you.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.