Are 6'4 males that are slim perceived to be awkward by the average folk?

I'm a 6'4, 150 lbs 18 year old male and whenever I stand beside my peers, I feel so out of place. I absolutely hate the feeling, especially when I see my 5'11 friends moving around gracefully. I know there isn't any way I can become shorter, but what are some ways I can improve my awkward appearance? Would building muscle help? I kind of like being slim, but not tall and lanky.