Conas atá sibh?

I need a wee bit of help with a translation le do thoil. I am writing this in one of my journals and want to make sure I have it correct.

My heart away from nature becomes hard.

I have tried to word it in so many different ways and I am not comfortable with any of them.
(I need practice with my Irish to keep my learning going, but no one to practice with, so I have almost no confidence with my Irish.)

Could someone please help me out with this sentence?

Go raibh míle maith agaibh.

Cruaíonn mo chroí nuair a bhíonns mé i bhfad ón nádúr.

Wait for corrections, or other suggestions.

Go raibh maith agat Bríd. That is close to something I had written down already, so I think I might just go with that.
It is for my own personal use anyway so as long as I know what's going on, that is good enough for me.

Go raibh míle maith agat arís.