I Was A Good Girl But Why Did God Allow This To Happen To Me?

I am 35 years old with a year old son.

I met my ‘husband’ in 2013 and we started courting in 2014. We got married in 2016 June and got the shock of my life the two months later that my husband was already married with a daughter. I found out I was pregnant, from then on my life has been one long sad story.

The man I loved and trusted deceived me with his family’s conical. They claim he said no one should tell me the truth because he loves me and didn’t want to lose me.

The world believes I am happily married but I live like a single parent. I feel alone and sad because I grew up with a single mother and I saw the emotional and psychological turmoil she went through,I promised myself that I will give my children a better life but this is where I find myself.

Now the liar will not let me be, I want a restraining order against him but my family says the marriage should just be annulled traditionally so am free but I should allow him come around because of his son.
What should I do?

I want to move on and erase him from my life,that way I can be healed.

NB.. I just found out he has a second child with his first wife so the ‘I don’t want to lose you’ does not hold water.

My strength is failing me, am in a mess. I was a good girl, I kept myself and now this