<human>: Can you condense the text into a few key points?

We've been together for nearly two years now.  Both fairly adventurous people.  We moved across the country together (into separate houses) on a whim only a few months in, and moved in together after about 9 months of dating.  This was definitely rushed as this is both of our first real "adult" relationship, but we've always gotten along.  

He's moving out in a few months, citing a need to live cheaply (ie out of his truck) and freely.  Granted, he will be taking a very low-paid internship, but our rent is very cheap.  After this internship, it is unclear what his plan is, but probably to leave the area altogether.  
Neither of us have really settled well in the place we're in, nor do we have particular attachments or very fulfilling jobs.  I'm beginning to think seriously about my career (as is he), but he is definitely somewhat more limited as to where he will be able to accomplish his goals.  I have loved living together, and I love him, and would happily relocate to wherever he chooses.  He's my best friend, and while I am understanding of his desires to move out, it's leaving me wondering if this is actually a step back for our relationship?  

It stresses me out whenever we talk about it, but I am able to converse openly without too much emotion on the issue.  On other issues though, I am probably more emotional than he'd like.  He's a super stoic dude, and I've been treated in the past for depression.  It's pretty mild at this point, but I'm starting to think this is a big issue for him that he's basically escaping.  

Another issue is that our once amazing sex life (3-6 times/week) is waaay down.  I'm talking, like, once a month.  He knows that's not okay for me, but says hes just not a sexual person.  (Then why was it previously so great?)  Our non-sexual intimacy and communication are still excellent.  Do you think he's checking out?
<bot>: SO is moving out of our shared apartment in a few months but claims it is not a break up.  Has also significantly diminished the frequency of sex.  Should I just move on or is this something we can get over?