If it wasn't for your chest, you'd pass well. I'd second the thing on a slightly looser shirt. Sort of a middle ground between baggy and tight.
I gotta say though, I'm really jealous of how you pull off the long hair. It suits you, and you're lucky enough that it doesn't seem to hinder your passing at all. I've wondered what it'd be like to have myself a man-mane, but I doubt I'd pass if I grew my hair.