I understand where you are coming from. But can I suggest you need to act quickly before you become totally consumed in the non-eating, sleeping because I cant be bothered mode. Maybe suggest something simple to him, like going for a walk down to the cafe, or to the park, or see a movie? Have you indicated you miss him because he works so hard and you dont get quality time together? You dont have to nag him about it - just gently but firmly suggest it is time you both did something outside the house together.
Welcome to the forums and good on you for posting too!
You are not being a sook or dependent in any way. You have had the courage to voice whats on your mind which is healthy and well done
You cant drag him out door if he chooses to work. You bring up a good point about spending time together while the sun is out and having some fun together.
Communication is vital here. Letting him know that you that you need some time together.....even on a weeknight having a bite to eat may be a start...