Husband walked out while I was pregnant. Was it my fault though?

Long story short…

He left me while I was pregnant. One day out of nowhere he tells me he doesnt love me anymore, wants to do his own thing. We cried together that night and settled on talking it out, went to bed.

but something wasnt sitting right with me so I looked at his phone (never have done this!) and found a convo with another woman (coworker) who was msging him at 10pm for help apparently, and my husband never told me about her. She told me they are just friends and hes helping her with some issues, but it looked like he was deleting msgs with her since it was a fresh new msg that sounded like they’d talked before.. my husband was the type to shower me with love and without being asked say things like “i could never talk to another girl but YOU! Even friends!”so, this was super strange to me.

I brought it up to him in TEARS, my pregnancy emotions hitting me hard. We lived with my family so i ran to my mom and sis in tears holding my belly just sooo much emotions, and they just told us to cool off but my sis was obviously mad at him,

My husband then just fled the house, hes in another state now.. its been 2 yrs!

I know it was so wrong of me to run to my sis and mom when i was so distraught, but it hit me so hard because i was so pregnant and my emotions were just nuts!

Still, I told him lets talk it out please. A million times. But nope. He literally went and restarted his life.

I blame myself soo much, it eats me up.

He hasnt even met my son yet and I’m doing my best as a single mom.