hi- im also in england. i heard abuot aspergers a while ago and took the autism quotient test - http://msnbc.com/modules/newsweek/autis ... efault.asp an aspie test. i ahve just been sent the same test on paper by a shrink who is assesing me for it, so its pukka. i score very highly. i dont think its great, thuogh- no mention of the sensory problems which are highly indicatative, or dyslexia, dyscalculia also are common.
you sound very aspie- eye contact, loner etc.
getting an official diagnosis? depends on whether you feel it would help you, make any diff? you are obviously coping well- you work, for example. for other people its important, as they have speant years being harassed for being weird, dificult, not trying etc, and never being understood, always feeling akward and alone. though i bought whether you'd have to have any contact w social services. that's only in case of really low function.
once i get diagnosed, drs etc will at least take me a little more seriously, and give up trying to force me into group therapy when i have said i HATE BEING AROUND OTHER PEOPLE.
you might do just as well without it, but just getting a full understanding of the condition; i LOVE knowing there are otehr people who think in the weird way i do, obsess the same way, hate light touch and being hugged etc. it wont change much for me, but will just confirm that i have something real, and that im not being truculent for the sake of it, and that there is a basis for me weirdness.
good luck with it.