This is a common problem, but the solution is not what you think.
You have plenty of notes in front of you. Don't worry about using more boxes or trying to find more notes... it won't happen and won't fix the problem.
With a scale, there are only 2 things you can do to change it up. Rearrange the order of the notes and alter the rhythms.
My guess is that you're stuck changing rhythms around more than the order of the notes.
What you're doing right now is babbling, not talking (or at least not saying anything you want to listen to
Rather than trying to find more space to work with, you need to use less. Choose something small like the top 3 strings of box 3. It's out of your comfort zone. Don't let yourself leave that space until you are playing something you like.
It will be challenge and you'll probably decide more than once that I'm out of my mind for suggesting this. But a time will come when you play something cool and you'll like it. At that point you'll get what I'm trying to describe.
You basically have to turn on the creative juice and that comes more from limiting yourself than from giving yourself more freedom. I know it seems backwards but I've seen it work thousands of times.
So give it a try. Pick a jam track and a small region (no more than 6 or 7 notes) and go for it. You can run through multiple tracks if you get bored, but do NOT add more notes or anything else. You've got to learn how to make music with notes before more notes will help.
Check back in a few days and let us know how it goes.
Griff