Off putting or am I tripping?

Just gonna keep this one anonymous if that’s alright!

So my best friend of almost 5 years has recently seemed off to me. Her and her husband are having some issues as they invited her husbands friend to stay with them(he also has a son), now this friend is not the best and taking advantage of the situation. Rather than focusing on moving out he’s focusing on weed, booze, and making them watch his kid from time to time. To her and her husband this is super overwhelming/depressing which I completely understand but in all honesty it’s their home and this is something they can control, but aren’t. Before I had my daughter, every Sunday my SO and I would have a hang out night with them and her and I were texting everyday and if not everyday it was a few times during the week. Now after I’ve had my daughter who is 2 months now, they have only visited 2 times and I don’t hear from my best friend we can go few weeks without anything, unlike us. The entire vibe feels OFF. During these 2 visits the energy just was weird and most of the visit we all sat in silence which isn’t like us. She claims that this roommate is what’s going on but deep down in my gut I feel like it’s something else that she won’t tell me. I just don’t understand how a roommate could do this to a friendship? Am I being too harsh? Or is this actually off putting and strange to some? Just miss my friend. I feel so alone. I’ve tried talking to her.