Lol about the relationships with humans! I'm pretty much the same way. Fortunately SWMBO and I manage well enough, but it's always trouble. It's been trouble of one sort or another with everybody I've ever been with. I guess I'm hard to live with. I don't think I am... but I am the one constant in all of my failed and difficult relationships, so the evidence is stacked against me.
Of course, most of the time I didn't really like myself all that much. My weight was an issue there too, a cause or an effect...I'm not sure which.
I do like animals and they like me, but I've rarely lived in situations where I could have one (when I was on my own).
I hear you about the panic about gaining weight. Last summer when I was at my lowest weight (low 230's) I used to dream I would wake up and be 300+ lbs again!
Height: 5' 10"
Starting Weight: 292
Starting Primal Weight: 275
Current weight: 230.5
Goal weight: 172
Body Fat 30.5