My partner is a lying cheat who won’t change but I still want him

DEAR DEIDRE: Discovering my partner had cheated on me while I was pregnant three years ago was crushing.

I’ve tried hard to put it behind me but whenever I feel unsure or we argue, my mind returns to that infidelity.

He says the unstable state of our relationship is my fault and that I’ll never let it go.

I’m 29 and my partner’s 31. We’ve been together for four years.

I was overjoyed when I became pregnant. I thought he felt the same.

But then...