“I think one of the most interesting things about Peter Parker for us is that he’s the only person in the MCU now that has a secret identity, so we all know who everyone else is. I think it’s quite interesting to go back to that hiding behind a mask.”
Ultron who decided to eradicate humanity after using 40 seconds of the internet.
It's very well written but... The build up isn't there unfortunately, Cap and and iron man have never seemed like friends but more like teammates who have fought on the same side a couple times. So that line about tony being caps friend is kind of cheapened because of the fact that they never really seemed like friends.
I actually do think Tony considers Steve his friend. Look at how he treats all his close friends - Rhodes, Happy, and Pepper - he bickers with and verbally bullies all of them :lol Maybe that's why I find that scene emotional, that Tony actually considers Steve to be a close friend whereas Steve doesn't, and that makes the feeling of betrayal even more powerful.