I will try and add cardio into my daily life as I'm sure that will help.
I would agree with @Martynt74 that this is what you're likely missing. Long, fast walks, jogging or cycling. You can add it into MyFP and it will credit you with the calories burnt.
Daft question should I be aiming to meet that 2000 calories or should I pat myself on the back that i don't feel hungry despite being 800 short.
I went pretty hard core with restricting calories and it worked okay for me (not as low as 1,200 tbf). I think there's a balance of staying fuelled to allow the cardio work, but doing it efficiently and not consuming too many. IMO the short answer is, if you can cope on 1,200, go for it, but that might not be the healthiest way and it might not be sustainable?