I was in a similar situation about 8 years ago. Married my dream girl, she seemed perfect for those years of flirting and dating. Didn't really notice that she'd slowly separated me from my support network. After we got married it was like a switch was flipped, I was always on the defensive, everything I did was wrong, I was always the bad guy. Woke up one day feeling like it'd be better if I just wasn't around anymore. Stewed in my misery for months before realizing one evening that there was a source of my misery. Spent another couple of months feeling too embarrassed to do anything. Then one day she was giving me shit over some nonsense and I just blurted it out. It wasn't easy, but things slowly got back on track. I focused on myself and what was in my control, got back in shape, found time for hobbies I'd left behind, brought myself the joy that was missing. Now I'm happily married to an amazing woman who's provided me with an equally amazing child and it's hard for me to even remember the anguish I was going through.
Obviously our situations aren't the same, but I just wanted to share and let you know that things get better. Some friends will filter back in, some won't. Any mutual friends I had with my ex are just gone, she made sure to put barriers between us with shit talking and lies; fuck them too, they weren't true friends.