Questions: Girl's Behavior

I know that girls do this sometimes because they are busy or not interested anymore or for other possible reasons, but there are so many different types of girls, and I'm wondering if this is a possible reason.

I've heard girls sometimes take long to respond to see if the guy is really needy or not so a guy should not double text but I've also heard some girls are happy to see a guy double text.

Just started talking to this girl at my job. Been like 2 weeks roughy. So, It all started with her calling my phone at work to let me know my customer was here (I work in sales). The next day I text her to let her know I sold 5 cars she set an appt on. She texted back I texted back and she didn't say anything. The next day on Saturday, I was sitting by her and she said she didn't feel like texting me back because I have an android and she's gotta an iPhone blah blah. So, I said, "wow you're just not gonna say anything because of that". She's like, " Buy an iPhone". I told her to buy me one etc. Then asked her if she's got Snapchat? She's like yeah. So, I unlock my phone, open the app and she puts her username in and adds me. We talked a little on Snapchat. Now Thursday of this week, I find out she's gotta boyfriend she's been with for 3~ years. And HE LIVES WITH HER AND HER MOM. I'm like wtf? I heard from some employees they broke up. But, her dad works at the same place we do and he walked up to her and said her bfs cars leaking oil, etc. Now today, I asked her what she was doing over the weekend. She said she was going to hang out with her friends. I asked her if she's ever been to Chicago (the city). She said no. I then asked if she's ever been to any of the museums there. She said no but she wants to go to Shedd aquarium. I then said, "your boyfriend doesn't take you places"? She said no he works Monday-Saturday 8-6. I was testing her so I said, bet let's go. She said okay but not in my car. I was shook. So, I asked her again if she's being forreal? She like shyly said "yeah"... I'm lost.. Is she into me? Just being nice or tired of her boyfriend? Wtf I'm lost

Let's say a woman is in a relationship or is
married and she decides to hangout with an
all-male or predominantly male group of
"friends" without her boyfriend, husband, etc.
Would you find this to be a red flag? How about
odd? Weird? Worth questioning?
What if your mother had a group of all-male/
predominantly male "friends" and hung out
with them without your father involved?
Would this be weird to anyone like it would be
to me?