Hi Lemondrizzlez,
I just received my 8st award today so wanted to let you know it's totally achievable! I still have around 6st to lost so what worked (and still works) for me is to not think too far ahead about the end goal. I just found that far too depressing and it actually made me feel pretty rubbish about myself. Break it down into a stone at a time; each time you achieve your goal it spurs you on to the next. You could even give yourself a little reward or treat each time you hit a milestone. It's taken me 13 months to lost the 8st, but that was with a pretty hefty blip in the new year; without that I reckon I could have achieved it within 10 months.
Wishing you the best of luck on your journey, I'm looking forward to seeing you get to target!
Ann-Marie x