re: Zorra77's post-
Although I don’t have a problem with this and try to be supportive, I have to acknowledge that this change affects me too as his partner. dealing with raised eyebrows from friends when I refer to my ‘boyfriend’ (which from their perspective definitely requires an explanation) and deal with their lack of understanding; wondering what this means for my own identity (does that make me straight?), etc.

one way to lessen any pressure on yourself, is for him to tell is own journey? i also like what firie wrote! 
i've been talking to someone recently, a great and accepting sort of guy- bio, but not about my ex and the process of his transition- though the topic may eventually surface, it's a discussion first between them; i'm pretty sure raised eyebrows won't be an issue, but if i see any, i'll get over it- or he will.