Hi There ~ I agree that you have a fresh slate. Congrats on that! Jealousy says more about you than her. (think controlling her in a bad way, is that really what you want to do?)
I also think you should play the "put the shoe on the other foot game".

'If my girlfriend said this to me, I would feel...' 'If she treated me that way, I would...'

It might help. Just a thought...

And by all means do as Hammy says since you find it helpful. Journals only really work if they are private.