LaCrepescule
You're right Grandmabatty and what's weird is that when I'm unwell he just loves looking after me because he says he likes me being dependent on him!
This show all signs of someone with a degree of personality disorder. Hook em in, then when you are, and you wonder if you can do without him, he can be cold and that's controlling.
Get out, LaCrepescule. You will find its far harder feeling lonely but with someone than alone and starting to find your own strengths and resources. I had to, I did. (yes with circs of unwellness)
Just do it: he might try and hook you back in by turning affectionate again if you reject him: more warning signs.