[UPDATE] My boyfriend (25M) cannot handle being alone when I (24F) am busy

Original post here.
It's been eight months, and I thought I'd give an update.
First of all, we're still together. The advice was overwhelmingly along the lines of "this is a major problem and will not go away" - and I agreed with it at the time. However, after posting, I decided to wait a bit just to see how things went because I really liked the guy.
There are a couple of things that affected his behaviour that I didn't really understand before:

• He is not fulfilled by his work, and so any time not spent in work is really important to him and he wants to make the most of it
  
• Most of his close friends are big drinkers, and he was trying to cut back. This meant that he was not seeing his friends as often as all they do is go out on the weekend together.
  

These two things together meant that he was alone a lot more than he used to be and he was feeling frustrated in general. So here's what has happened since:
Over the summer, I wasn't in classes anymore and we spent a lot of time together. This sort of goes against intuition, as I thought more time apart would be better. But there are a lot of days when I don't feel like doing anything, so if he wanted to spend time with me, that meant that he had to come up with something to do while I was reading or sewing or doing whatever on my own. He got comfortable with watching something or reading something while I was sitting there doing my own thing.
He figured out how to hang out with his friends without making it a big drinking night. They started going out to dinner once in a while. He would go out with them occasionally and just not drink as much and go home early. I think this really helped him not feel so alone.
He came to terms with how unfulfilling his job is and he's currently working to fix that. A few months ago, we started having some honest conversations about what he really wanted to do, and he was trying to figure that out for a while. Well now he has a solid plan of getting to that new career, and while it will take some time, he gets so excited just talking about it. I think this has helped tremendously.
Thanks to everyone who commented. I think everyone was exactly right that it was a pretty major problem, which is why I posted. I appreciate everyone telling me that though. Sometimes you need to hear that. I'm glad I gave it a chance to fix itself though. I honestly couldn't be happier in my relationship than I am now.
tl;dr: boyfriend and I are still together, he's figured out to be alone, things are great.


Source.