<human>: Can you give me the gist of the text in a nutshell?

I think it's impossible. I want to connect with a former roommate because we lived together, we were friends once, and we still have friends in common. I think...actually I know that my ignoring z has put a strain on a few of my friendships. I'm not 100% sure I want to be "BFF OMG Friends" again, but I think I need to at least rebuild the bridge so that we can be invited to the same social occasions without people being awkward. 

I think that if I'm so hyper-focused on not taking blame for the disintegration of a 4 year friendship, then I may not be ready to write this letter. I want to basically say, "I'm sorry my silence hurt you. Somewhere along the way, I feel like I lost my voice. I've just needed time to find and reassert myself. I know we can't rebuild what has broken, but I hope we can meet again and start from a new point."

Notes: I did speak up when I was dissatisfied, I was just ignored. Z would railroad, ignore and rationalize away everything I said, treating it as very insignificant. It felt like emotional abuse. I know z didn't mean it, z is just a product of z's environment.

Other note: I'm afraid if I write this, z might want to meet for coffee and completely dissect every little thing that went wrong. But I can't win, because we don't see eye to eye, and I'll compromise on a lot, but not enough to satisfy z. So I just need to be assertive in not wanting to rehash the past? What if z insists?
<bot>: (I wouldn't have!): need to build bridge with former roomie, how do I do that without taking blame for breakdown of friendship, and without dissecting the past?