Martin. – I'll try my best to answer.
- Is this a normal reaction to one of your oldest friends changing their gender identity?
I think this has more to do with them being, well, "socially aware", and not so much with them being gender neutral. Discussing social issues is undoubtedly tiring, and even I don't like to discuss it in length with my friends. I personally think that this isn't a reaction whatsoever to gender identity, but perhaps more with who they are becoming as a person.
- Do you think me shifting away from him socially and finding it uncomfortable/tiring being around ver is related to this shift in gender identity?
The being uncomfortable part is kind of weird. If it's directly because you're supposed to use ve/ver pronouns, which it seems this person is going by, then yes, it's a little weird. However, if it's simply because this person talks about social issues and such, then no, I completely understand how it can be tiring. Considering I do not know this person, I'll be going out on a limb here: do you think that, due to their self-realization, they've decided to work more towards social advocacy? Perhaps that's why you're noticing a change. It seems to me that the more people understand themselves, the more people tend to start fighting for what they believe in. Becoming proud of yourself can definitely lead to being proud to be vocal. So to answer this point, no, I do not think it has to be with this person's transition.
- If the answer to 2 was "yes", do you think that I am "genderneutralphobic"? (IDK if there is an actual term for this so I'll just go with it)
Well, no, considering it seems to me you're uncomfortable talking about social issues with them.
- If the answer to 3 was "yes", how do you think I could adapt to come across as less "genderneutralphobic"?
See above. However, if you fear you are transphobic (this is the word for it by the way, not genderneutralphobic) then there are a few things I can recommend.
Here's a useful link that you could learn from. If you're set on being a better friend, then the previous link will definitely help you. This website has a few other helpful things as well; really, just explore.
- If the answer to 2 was "no", do you think that I was probably reaching a point where I would naturally shift away from him due to personality clashes etc.?
Honestly, with this person developing and becoming themselves, it could just be that you guys aren't personality matches. And if it really is from your conversations and discussions, then I don't think you are at fault. If anything, I would be honest with this person. Maybe just talk to them and say "hey, Ash, could we maybe talk about something of interest to both of us?" and if they really don't work a little bit to try and talk about enjoyable things, then maybe it is your time to part separate ways.
To summarize, I personally believe the issue lies within you becoming uninterested in what you two are discussing. Again, I don't know you or your friend personally, but I hope I've been of some help.
p.s. I just used they/them pronouns since it's a neutral pronoun. However, I'm sorry if they do not like to go by this and I will happily change it and correct this post if I've accidentally used a wrong pronoun.