Is Bronx Story different from A Bronx Tale? I can relate to the latter and it's one of my favorite movies of all time.
I have many acquaintances, but only a handful of true friends. It's not that you have to intentionally test your friends, it just happens. It's all about reciprocity, and if it's not there, what do you really have?
You learn really quick what people are all about when things get a little rough. I've cut ties with friends because they didn't have the balls to help me out in fights. I don't care how much of a pacifist you are, or how many guys there are, if you're my friend you'll have my back. Even when I'm wrong.
I've been good friends with three other guys since high school. We called each other the Four Horsemen (I know, haha, wrestling). People knew back then and they know now that if they mess with any one of us, the others will be right there without hesitation. Even though we've gone our separate ways and we live in 3 different cities, we love each other like brothers.
Back to the point, we've had fights over money, but you move on. Maybe I'll think twice about lending the guy money again, but it's only money. The biggest strain of any of our friendships was due to one guy working for the other. It didn't work. Also, I've seen many friends become enemies over women. Some people have different opinions, but I would never mess with any of my friends' girls if I expected them to remain a friend. That's just a given in my book.