Ah but, he wasn't really there to support you, you were there to support him. It's easy enough to switch off and just go "uhuh, uhuh" at the right moments during a phone call (have done that myself, with a friend who was always asking for advice but never took it, so in the end I just let her rant and she didn't really notice the difference). He gave at least as much grief as he helped with and he cost more than regular counselling, one way and another. So what you're missing is the illusion of someone who was there for you.
"Nice" how he's going to help you finish the house. He could have done that at any time over the last how many years? Instead of hiding in a bottle, avoiding working at his business that you paid for and shagging another woman on the side.
Glad to hear things are mostly better, barring the odd shit day, and that you were able to have a good chat with your bro. You can always come on here for a moan as well, of course!