<human>: Can you condense the text into a few key points?

Started sleeping with a girl 6 months ago, at the time I was 6 months out of a long relationship with my ex and didn't want anything serious. 

However during the past 6 months I've grown a lot closer to my FWB than I thought I would, we've gone out for meals, to the cinema, etc, all my friends joke I'm actually dating her already.

However recently she seems to have been pulling away and having less time for me. I mean she has been busy recently, new job, moving house, etc, but when she does have free time she tends to see her girl-friends.
I mean, I'm okay with this, but I'm not exactly feeling wanted atm, so I'm not sure how to approach the subject of becoming a couple if she's leaning away.

Side note, I suffer from anxiety/paranoia, so may be hurting more by being put on the back burner than I should be. I mean, we're not actually in a couple, so I shouldn't really give a fuck, but I really like this girl and want more.
<bot>: Wanting a more serious relationship with FWB, think she's losing interest in me. Have I missed my chance?