I'm not sure what sort of answers you're looking for here. You've asked him what's going on and he's told you. Relationships are complicated, and moving from being best friends to being in a relationship is a big shift even with you having feelings for each other beforehand. You said yourself that you took three weeks of communication to adjust before seeing him. He's having his own adjustment period now, and that's fine. It's only been two days. When dealing with big feelings that's no time at all really. It doesn't mean it's not going well. He just needs to get his bearings. I'd be empathetic and give him what he needs, whether that is a bit of space or something else.