Good luck.
All words are made up. We can decouple them from the baggage. You're the one not letting go. Just let go. It's easier and more fun on the side of the pond that goes "Yeah, all that baggage we don't like? Screw it."
Then stop making it about identity.
Because you make it so.
I have to laugh at the fact that "amigo" is too foreign for you to use. You want to assign some level of respect to Dude/et all and won't use Boss because...they're not the boss of you. Or Hefe, because that's probably too "foriegn" to you. Forget that English has more French and Latin words in it than a liquored up Roman Soldier roaming through Gaul has rocks in his sandels, but if it's got a little cilantro and lime on it it's verboten. Or "bad history" because ya know, only the Reds use Comrade.
All of that but Friend is a-ok. I don't know you from Adam. If you come up and call me friend my first assumption is you're trying to get something from me. Of course I still wouldn't be offended, but I'd absolutely wonder what angle you're working and why you think I'm too stupid to not see you working that angle. Friend is super, overly familiar.