are you measuring yourself? I am in the same boat and I think some of it is my age (40's, losing was so easy in my 20's...) but I am losing inches (well, inch), my cardiovascular fitness is much improved and I can feel my legs shaping up.
The scale, however, not moving.
You could go visit your doctor to have them rule out any medical issues that might be causing it.
No tips, just commiseration!
It's about commitment, not motivation.