So, I have been following your posts too. And I think you're the perfect case to share my brutal honesty with.
First of all, about your head. Your head circumference its not so unusual or big, mine is almost 60 cm too and I'm shorter than you (5'7'') and I'm an M size on women's cycling helmets (just check sizing in brands like Specialized for helmets, 60cm its not even an L women size).
It's true you could benefit from FFS, specially from Jaw/Chin reduction. Its true that while not masculine in shape your jaw may be a little on the big side for a girl and this can be masculinizing to some extent and making your head look a little more big.
But the overall head size its not masculine. In fact, a big head is an usual trait of neoteny (just like a childs head, it is proportionally bigger). Neoteny and femininty go hand in hand (the most neotenic a female adult looks the most attractive is perceived by adult males, just science).
About the rest of your face, it looks pretty ok to me. You got little to no brow bossing, a low bridged nose (its not small but looks feminine) and a head full of hair.
Now, about your frame. Yeah, you don't have one of those ultra petite asian-like body frames, but I think is pretty within the female ranges. Moreover, you don't look muscular at all, not even toned. If I were you, I would give a try to lose some weight (not much, you're not overweight). A very skinny girl will always look andro (sometimes less is more), so you don't have to worry about having large boobs or a big booty (and those can be solved by surgery) while you can benefit from looking a little more petite overall. I don't know whats your BMI rite now, but I guess you could try to be around 18-19 and see how you look.
And now, about your presentation. Well, your presentation is... to put it politely, not the best one . I understand you when you say you're too feminine and shy on the inside that you don't want to overdo it an look fake. Ok, I get that, happened to me, but... that should not prevent you from improving. Why don't you try making baby steps? Just a little at a time? It's not about going from butch to hyper-girly on a day, but about making little steps. Lots of cis girls would have trouble passing putting the same effort as you on their presentation. Hon, we all think you can do it *A LOT* better without overdoing nor going very girly.
As a sidenote if you're thinking of growing your hair (which will be really nice) then please straighten it. Lack of volume can benefit you and it will turn the hair more malleable. Keratin and such, give it a try.
Also as a sidenote, I remember the pic with your girlfriend you posted and well... lemme say you look *WAY MORE* passable than her.
That said.