Husband will do anything to avoid sex with me

My husband never wants to have sex and it's been so long since we last did it, I can't even remember it.

- 

Intimacy started to go downhill after my difficult pregnancy with our youngest, then a traumatic birth. We didn't have sex because of all the health issues and then coping with a newborn, but then it just carried on.

He will literally do anything to avoid sex with me - he'll go out with his mates, stay at work late or watch rubbish on TV until I'm asleep.

The other night I lost my rag with him and it all came spilling out. He admitted he wasn't bothered about sex but wouldn't tell me why, claiming he didn't know the reason and saying that I was making too big a thing of it.