AITA for breaking a promise to my best friend? I've been working in pretty big company for a while now and have moved up the totem pole a bit. But the thing is this job has been making me depressed and I dread going to work everyday even though it pays really well. 

My best friend of over 15 years finally managed to join the company after trying thrice. I had already planned on quitting for a while but he made me promise to stay on another year while he adjusts to the company. I agreed at first. 

But now I realize that I can't deal with the stress and dread and that it'd be better for my mental health that I resigned. 

I've told him that I'd introduce him to all the right people and give him the right contacts he needs to survive. I'll even coach him and help him out. But I really need to quit. 

So... am I the asshole?