Listen lovely, I have been in your situation TWICE
Yes, both times I was pregnant and the kids dads left me for somebody else. I had my nose rubbed in it. I was still grieving the death of my dear grandfather the first time it happened and I had lost my job. I had literally hit rock bottom.
That, the first time was in 2008. I am still here. I am still standing. I got through it.
The second time was hard, but I wasn't in such a bad place when it happened. I got through it.
I can tell you, 2008 was the worst year of my life. It should have been one of the best because my son was born in that year. But I hate that year, I can barely even think about how bad things where back then. But I got through it.
2012, another bad year, but I got through it.
I can't tell you how, because frankly I have no idea. But you will get through this
Fast forward to this year, I am now married and very happy.
You will be too. You just have to go through it before you can get past it.
I'm sorry you are hurting 