Family is complicated.
Sounds like uncle did you a solid, taking you in when you needed a place to stay.
And now that you are preparing to leave he's missing you/lonely already (never an excuse for violence, or even emotional blackmail)?
One thing you might try (in addition to prayer, if you think that helps) is reminding him how grateful you are for his help, and that moving out doesn't mean "never see again"?
Sounds like an insecure man.
BTW, Happy Birthday toastedcoconut
http://emoticoner.com/files/emoticon...miley-face.gif