You can fix this, but you need to take a COMPLETELY different tack.
Listen to what he's saying: "he says he's just tired, doesn't have time to himself and can't see where we're going."
Give him what he wants -- start going out more without him in the evenings (so he has time to himself). Give him a LOT of time to himself. Take the DC away for the weekend. Start going to the gym at night. Start a new hobby. Start looking after your appearance, and stop initiating ANY "tawks" (a Tawk is emotional, depressing and heavy) about the relationship.
Always be busy - always be coming and going. Don't hang out with him. If he watches TV at night, vanish upstairs into a bath with a good book. Ring your friends more. Turn your focus completely outside the relationship.
NO COUNSELLING. I'm serious, it's not appropriate here. He'll hate it and it'll only be his bringing up past issues and destroying your confidence.
Basically, turn yourself back into the woman that he first met. Independent, busy, sometimes unavailable. Not your current persona - worried, clingey, emotional, pessimistic. It's a sad fact of life that we all want people who appear not to want us that much. Look how precious your DP has become to you since he's started backing off -- it's the old story.
You can completely regain his interest (if you still want it) but it'll require living a lie for a few months, in a way. But I'd say you have nothing to lose.
It'll either give him the space he needs yo realise how much he loves you, or it'll mean the last few months of your relationship consist of you being fabulous and feisty and dignified, not following him round suggesting counselling.