Do you think he's still interested?

You shouldn't have to feel guility about anything at all. You didn't like him at the same time he liked you. That was your own decision, now it's something you have to live with. Don't feel guility about it. If the two of you continue to text back and forth, it definitely means he cares about you and your feelings. It's still worth a shot - now that you really like him, you have to be the one to ask him out. It's ok if you don't ask him in person, if you're too shy. Remember that. Good luck.