Pregnant and dating

Okay so here it goes. Baby's father left when he found out I was pregnant we was in a long term relationship. I'm half way through my pregnancy. A few days ago I was sent a friend's request and accepted. We got talking and have got on really well. Now this is all in the space of a few days he then asks me on a date which I have accepted. I haven't told him I'm pregnant because well like I said it was a couple of days I was talking to him. But now I've accepted this date. I just don't know when or how to tell him. He hasn't asked if I've got any children and I think has he not asked because that doesn't bother him or that he can see through my Facebook that I haven't. I don't actually post much anyway so I don't know if you'd actually be able to tell if I did. Now I know I might get alot of negative comments that I should focus on the baby only. But pregant or not I am still a single person. I haven't intentionally put myself out there to date. This person added me and we got talking. And I enjoy talking to him and having someone to actually ask how my day has been. I guess I just want to hear from real experiences. And any advice if you are pregnant and single or have young children. Thanks in advance 😊