She blames birth control/child birth messing with her sex drive, which I do believe (we have a 2 year old). But there are other factors that are playing into it as well now that make me feel lonely.

She claims I'm just over analyzing but now its to the point where if I try to talk about it, she waits until the sex subject comes up in the discussion and blows up at me thinking thats all I want. She said in anger that I can go find some other girl to have sex with. I don't plan to.

I love her, I just feel like this is becoming one-sided or there's someone at least emotionally that's stealing her attention so its draining everything we have.

I plan to check her phone throughly soon. I believe she is 'chasing' one of her co-workers, be it her female boss or another. I feel like a paranoid nut now because we've gone stints of like 3 months without sex. Once a week was ok but now I feel like I can't even show her ANY type of attention besides a peck on the lips or light cuddling without annoying her.

What would /lounge/ do?

Better idea OP.

Just go start fucking dudes.

I fuck dudes and boy, lemme tell you what, a non-flamer gay will be both your best friend and your best romantic lay.