I've been through the same thing this past month. I left Omaha to live with my parents for a few weeks before I move to England. While I was still in Omaha, I got the same response from friends, they would SAY they want to hang out, but wouldn't act on it, would never follow up on plans. Like they thought saying how much they would miss me was enough, the thought that counts right? Maybe it was jealousy, maybe it was the fact that they weren't really that great of friends, maybe it was subconsiously their way to protect themselves from getting hurt.
I was laid off work 2 months before the move so I know exactly what you are going through with the boredom! I did a lot of art, read books I've been wanting to, and made a promise to myself that everyday I would do one thing related to the move (sort through pictures, sort out clothes, meticulously scrub the bathroom for my landlord's inspection).
The advice I have to to get out and do things before you leave! I had been hanging around the house for 2 months, usually in my PJs, waiting for my real life to start (the beach life of Florida, then the exciting move to England!). Now I'm here in Florida and suffering from a 6 day asthma attack, so I can't do much more than walk to the bathroom without nearly passing out. I'm so mad I felt like I had to 'wait for my life to start' when my health was perfectly fine, I wasted it by sitting in the house watching Netflix.

So my advice is to get out and see your city before you leave. Take a mini roadtrip to see somewhere you've always wanted. Take pictures. Go to the zoo, the farmers market, an art gallery, try eating places you've never had.
I hope the dreariness passes soon! Good luck with your move.

PS Congrats on the wedding! How exciting!