need some ladies advice please it's make or brake

What do I do 
I have been with my partner 6 years 
We are exspecting a baby our first 
He is so secretive he never tells me anything never talks to me if anything is bothing him 
I have to constantly flip my mind until I work it out my self 
Why would he block 2 women that are sisters on his Facebook when I came to ask him about it he said he Dident know who that are I said sure you do there on your block list he then finally after 5 minutes of lieing to me admitted the work at his work and they Dident want him inboxing him so I got the wrong idear I said 
You have no life here we are constantly saving for nice things and paying bills he said I would have a better life with them but I am here with you 
3 years ago he put me through hell he never came home at weekends he was texting and meeting over women telling them how good looking they are he was always lieing to me 
I just don't want to go back to how we use to be over 2 women what am I gunna do I can not sleep I am over thinking and then I am believes he what I am over thinking 
Do I leave him for him to go have a good life 
I am now nervousness of him going back to work what if there's more to it 
He knows he has done wrong his tail is between his legs I just don't know what to do 
I keep thinking he's blocked them on Facebook so they wouldent find out we're engaged or that he even has a girlfriend 
What would you ladies do if you was me 
😢 losing the world to live here