I don't think you currently hold the confidence or experience to be a leader. Most guys don't, and I don't think you've ever had any practice at it. If you were given some chances to practice it maybe you would get better at it, but you also might not. Some men are simply not good at it.
The best you can do right now is work to increase the respect of your brothers around you, and the main way you can do that is getting more fit. This is somewhat reminiscent of a conversation I had with Thomas around 3 months ago when he told me that the most powerful statement I could make in terms of leadership is losing weight. By doing that I would be proving how much I care via action not just words. I am saying the same thing to you right now. If you want somewhat like Johnny to see you as leadership material you have to give him a reason to think that. It won't just fall from the sky.