"I guess because she is watching him play video games at his house."
Mindreading.
"So do I engage her during that time? I did that the first few weeks but then thought I needed to pull back a little because I couldn't figure out if it was too much."
Again stop thinking of things as a "strategy". If that's something that the two of you interact positively about, then go for it.
"Also, she still posts political stuff on FB but I have stopped commenting or liking them. although I always usually had something to add or comment on. Should i be doing that at least sometimes?"
Why not?
Twist the situation around so that it becomes fun.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.