Please tell me it won't always be like this

[Bambino1234]

My partner left me at the beginning of the year - were in June now and I wonder when I'll stop looking for answers and be able to get on with my life.
We have two children whom are only young and I just feel so awful for them.
I don't miss him but I'm struggling with the hurt he has left behind ! He's happy with the OW and I'm left wondering why the ones who cause the hurt are the happy ones !!

Things will get better, eventually. You're grieving, it just takes time to heal. Try and focus on yourself and you're little ones.
I know it's easier said than done but try and do things for you that make you feel happy.
I think it's easier for him because it was his choice, he had the control
Over the situation and he chose to leave. Life's scary when things are taken out of your own hands, try and regain some of that control in life, starting with your own happiness.

Time is the key here. Don't be too hard on yourself. Consider that he wasn't worthy of your love and was removed from your life so you could meet someone a thousand times better.

And please know that the best way to piss him off is to look and be at your best at all times. Be the best you can be. Let it all motivate you.

Does he see the children, pay you maintenance?

He sees the children once a week.
He pays me what he can so it differs each week.
He is self employed and runs his own business.
So while he's off living a life of freedom it's me picking up the pieces, me holding his children who are still questioning why he left and there only 3 and 4.
I'm tired, I'm doubting myself and I wonder why he who has caused all this hurt gets such a good deal.

It took me a year before I felt like I could move on & he's the one loosing out on time with the most important people, your children.

Understandable that you are feeling that way but remember you can actually hold your head up high and look yourself in the mirror, he will at some point in his life have a lot of regrets.