sliding into my dms.....and deciding to follow me.....I am so sorry for posting this in this group just really confused.

So we're really close friends I guess so close that we know one another etc and my friends joke I have hair like his from behind anyway so he started darting in October and I know obviously but to respect her I stayed off her social media pages & would just go on as normal with him....and then she's suddenly messaging me to introduce herself giving me "back off" vibes....kind of telling me she was his gf without telling me she was his gf and pointing out she was living with him & I just felt a bit funny because I'm not trying to do anything and I'm just doing my very best to respect her? And then his brother randomly started following me too and I started getting anxious lol....I haven't followed any of his personal family or anyone out of respect and because he's pretty much a model and stuff and now idk why I'm being dragged in, I don't neccessarily mind if I'm honest but I'm getting all kinds of confusing signals and just sitting here wondering what I'm meant to do if anything. He won't stop reminding me how important I am, his mum calls me he sweet dear lol...his aunt wants to meet me and now I'm just idk....I don't understand which way to go because I value the friendship we have over so many things.