How do you deal with someone awful that has to stay in your life?

Hi all,
First time caller to Fluther.

Sorry this is so long.

My darling daughters Dad and I are divorced.
He lives 3 hours away, she sees him every fortnight.

Sometimes he seems like a different person and he’s really lovely – most of the time he’s controlling, manipulative and leaves me feeling nothing more than a speck of dirt in his shoe.

He tells me I’m stupid and that all I speak is bull#h$t.

He tells me I’m trying to ruin his relationship with his daughter which I’m not – I’ve even let him stay in my own house so he could see her.

He’s getting married, and since they announced the engagement he’s been nothing but awful to me.

This week he wouldn’t even tell me when he was dropping my daughter off, and when I asked he just told me to chill out, he’d sort it, he told me that I was hilarious and if anything i made him giggle at how stupid I was.

I have to have this awful man in my life – and though I have no feelings for him anymore – his words actually hurt me.

I can’t talk to him about it – we’ve tried. We’ve gone through the courts several times as we can’t sort anything out.

If I do talk to him about how he’s being disrespectful to me he tells me to look in the mirror or that I’m ridiculous and I don’t know what that even means.

I take responsibility as I’m an emotional person but I haven’t once insulted him, yet he continues to do me.

I’m worried about how this will affect my daughter (4)

What can I do to stop his insults affecting me?
How do I not react and respond which in turn creates a bigger charge of hate in his responses.

I’m alone.
I’m at the end of my rope, this has been going on for 3 years.

Sorry this is so long, I’m just lost and need some support.

Thank you.