Hermosa- with your 'bro' friends especially, I think they know their relationship with you in going to change. There's still some deep ingrained gender separations that almost every culture has- it's expressed differently and there are plenty of cultures that celebrate transgender and non-binary folk as the gender they wish to associate most with. But- it does mean they are going to think of you differently and they may feel obligated to treat you as a woman rather than one of the guys. So in their own minds at least, they might feel sad that this is going to change, no matter what any of you do. In a way, certain parts or aspects of your friendship may die- if you are open to still doing certain activities as friends, keeping an open communication about how you'd like to be treated will help them a lot. It can be a little confusing. I had a crush on a MTF before they came out- I felt guilty when she told me, because I had not noticed her disphoria and felt guilty for thinking of her as a man for so long! Not all sadness is personal, I know MANY of my friends felt guilty for messing up my pronouns and I often felt guilty if I messed up about any of my transfriends as the wrong gender. People might feel they have done you wrong by seeing you as a man, or 'one of the guys' and they may be asking themselves how they missed it. Your avatar looks very cute and femme, by the way... If they were seeing you in a more feminine light, it might make them seem more callous and oblivious. No decent person really wants to do something that makes their friends sad! Just from statistics alone, the average person on the street is cis and straight, so people tend to assume these things and feel bad when they are/were wrong. I know a lot of cis people that are happy in their identities and they can relate to being made unhappy by being called something unpleasant, rude or simply just wrong. They may not feel the specific hurt of gender disphoria, but to be honest- I'm sure most humans are pretty critical of their own bodies for many reasons aside from gender differences and can relate to the feeling of not being happy with one's appearance or social standing, or even stereotypes. Few cis women and men are perfectly comfortable with ALL the stereotypes of being their gender... Maybe some of them can relate to wanting to feel feminine or not stereotypical GUYS in some way or another!
@megan7777 I'm sorry that your wife has such a strong reaction, that would scare me too! I feel there's a little too much of a loss and grieving on her part, but we all react to things differently. :C