I do sympathise, OP - I lived in Manc with my OP when we first got together, and would have ended up staying there if he could have got a job - as it turns out, the first job he got was in London, so we moved back to London, where I'm from.
I admit I was a bit relieved - not that I found Manchester boring, but I am a Londoner, and just missed it. We then moved out to the Home Counties, and only recently moved back nearer London - I have to admit I do love being able to get into London more easily; just the red buses cheer me up.
That said, we were in Didsbury, which is quite kicking, and had lots of friends there, so weren't so cut off.
Not surprised you found Stockport station depressing - I suspect even the most die-hard Stockportian probably feels like that. I mean, I like London but feel a tad unimpressed when I arrive at Luton airport, say.
Give Manchester another chance - as a southerner, it is a bit of a foreign country - I'm bilingual, now, after many years, and can 'mither' with the best of them, and we eat our fill of Eccles cakes etc. But there is a bohemian side to Manchester too.
Or move?