If anyone that your in a relationship with threatens to kill themselves if you leave them thats not healthy, that's basically putting you in a cage. Talk with him abt it, and tell him that either your not happy or you need things to change..
plus his dad just died today and he absolutely wanted comfort from ME specially for some reasons, he didnt even said "please"...
if i talk to him he's gonna be sad once again... i just want to see him smile...