Hi, I have never been formally diagnosed but I do think I have Aspergers - my mother first suggested it years ago when we were talking about my childhood. She's the sort of person who thinks you have whatever she's just read about, but the more I investigated it the more it rings true.
In my childhood I didn't really "get" other children, I preferred the company of adults. As an adult i'm more the other way around - I guess I prefer people who have fewer expectations of how i'll behave or don't expect me to be exactly like them. I used to play structured and repetitive games like standing up dominos for hours and hours and finally knocking them down. i loved jigsaws and reading by myself. i also had a set of people toys - playmobile style - that i lined up. each one had a name and they had to be in the right order. then i "played" with them by moving each one a step forward at a time around obstacles.
As an adult i've noticed i prefer other people with aspergers traits - geeky people who share common interests and socialise around those. I did a maths degree and a lot of people on the degree were like that so i made a lot of life long friends! my friendship group is based on activities we like, on an opt-in basis - so if someone says "lets go out for a meal" everyone signs up or doesn't depending on whether they want to go, and noone is offended if you don't feel like it or don't want to do it. my sister and husband find this odd - their friends would go along so as "not to offend" anyone or for the company. i make friends very slowly - i have learned to socialise e.g. with colleagues but i'm not good at small talk. i only let people "in" i.e. consider them a friend after i've known them for a year or two and have seen them in several different situations. Between just met acquaintance and friend I tend to compartmentalise people and think of them as a "baby group friend" or a "church friend" or a "knitting friend" but not socialise with them at all outside that situation.
i also have serial interests which i get deeply passionate about, they last about 2 years then i'm bored and start something new. so far i've had: hanggliding, snowboarding, chinese dwarf hamsters, premature babies, knitting. maybe you could count mumnet in the list too!
I too have been told i can be quite blunt, i give honest answers rather than the politically correct ones, but over the years i've learned more about what people expect and i will bend the truth for an easier life with people i'm not that close to. i'm very emotionally self aware which i believe is from a lifetime of having to actively study it in others - and i don't have a problem with empathy, but i do often make black and white judgements so once a person gets on the wrong side of me (which is rare and takes a lot) i tend to write them off forever. i am also quite open and probably overshare a lot on mn and similar forums (sorry if this reply is too long). once i'm on a topic i'm interested in its hard to shut me up.
I don't believe high functioning Aspergers needs "fixing", instead its part of the diversity of life. It brings a lot of benefits - its highly correlated with intelligence, higher earning potential, ability to be self reliant emotionally, and superfunctioning in many areas. I think the price you pay for it is sometimes getting overwhelmed by high sensory situations, and being a bit out of your depth in complex social situations.
i've just started reading a book called AsperGirls which so far is good. the premise is that Aspergers is more prevalent in girls than often thought, its just less frequently diagnosed because girls tend to be more socially compliant and have aspergers interests which are more "normal" and accepted. a lot of women are only diagnosed when their children are diagnosed. the book is about how to cope as an AS spectrum woman and how to be proud even. Maybe you could pick up something like that and read it?
Back to your OP - you say you don't really need to change... but on the other hand you sound a bit annoyed that your therapist is veering towards aspergers questions. Are you looking for a clear diagnosis? Some help for particular situations or feelings? I think being clear on what you want would help people answer.
Hope you get what you want!