Can I add my two pennies worth?
My family are from N. Wales. I lived there until I went to college in 1991. I went to a bilingual school, however back then it was truely bilingual. We had 'English speaking' streams and 'Welsh speaking' streams. The language we spoke at home was English. However, by the true nature of the school all the English speakers were great Welsh learners and we all crossed over. Generally it was great, worked really well.
However, as much as I love Wales and my family I could never go back now. Since I left the true bilingual nature of our school as changed to ^everything being taught through the medium of Welsh. I know this as some of my old school friends still live there and there children are currently going through GCSE's and A levels. My friend dd's just got great grades at GCSE despite this. She had to go to Chemistry and learn all the stuff in Welsh (welsh periodic tables etc), translate it^ into English in her head to work it all out then translate it all back into Welsh. I hear examples like this all the time.
I love Wales and the welsh language - I can still speak pretty well. However, as we speak English at home I couldn't put my kids through all that. I would want them to learn it as a language but complete teaching through Welsh only wouldn't not make me comfortable.
I know parents that have moved over the border. Not because they don't want their children to ^learn^ Welsh, but because if the aggressive welsh language enforcement. I do believe this is only prevalent in Gwynedd though 
I'm sorry you're not feeling happy OP. I live in England now and if its any consolation it's taken me 6 years to feel kind of happy where I am xxx