<human>: Quick backstory: Been married for almost 9 years. Together for 11. Our first 3.5 years of marriage he was deployed so we didn't really see, or talk to each other much. 

There has always been something a bit off but it wasn't until recently when a childhood friend of his said to him over the phone (friend that he hadn't spoken to in over 8 years over his treatment to said friend) that he was a Narcissistic Sociopath that i began to really look into this. EVERY single characteristic of both diagnosis is 100% him. Every coping characteriatic of victims, i have either displayed on some way or am currently displaying. I did leave him once about 1.5 years ago. i left, attempted to file for divorce and well, 4 months later i moved back in... I know, why!? Anyway, so leaving at this particular moment is not an option. Aside from this he also suffers from severe PTSD and TBI (traumatic brain injury) from combat.  Many of his behaviors i ignored thinking they were PTSD related or due to his anxiety or depression. However the level of disrespect lately is just getting unbearable. He's out until 5,6,7 in the morning, he turns off his phone while he's out. Just tonight i found out he has a secret Snapchat in which i saw he is in constant contact with a few girls... We have a child together and i need help! how can i make staying bareable? And again, i cant leave. im scared for my safety, the safety of my son, and my family which is where I would be staying. Hes unstable and i just dont want all that around my young son. So so i ignore what I know? do i ask him, do i try harder? Any advice would be greatly appreciated!

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I'm just realizing my husband is a Narcissistic Sociopath and I need help coping. Does it get better, ever?