Is this flirty?

I live in a house that I share with 3 flatmates (it’s 2 girls and 2 guys)… we’re all in our late 20s and we have a group chat all together but lately one of the guys and I have been chatting privately too, and today I kinda tested the waters but I didn’t want to be too obvious…

Here’s the convo, do you get the hints of flirting or is it just me?