<human>: Summarize the given text in a few sentences.

So I've have a friend who I know has a boyfriend and I'm quite fond of her.  
I met her through work and we used to chat through out the day online. She recently resigned and but we've kept in contact and still message each other alot via text.( 20+ a day)  
Being the happy go lucky socially awkward person I am, I'm kind of not chasing her, as my ADD has only recently been diagnosed and have mild depression as well - she's one of the few people I talk to about this. I'm not medicated yet & I've only been taking anti-depressants.  
I found out she had a long-term boyfriend during one of our first chats together & have never met the guy.  
Recently she has started to ask me more personal questions, arranged times to meet up and haven't really questioned her status. (by personal questions mean like interrogation type stuff that you'd ask on a date) 
   
I'm a pretty clueless guy and who doesn't really respond to social cues well. Any advice on what steps to take next? Without shooting myself in the foot.
<bot>: I like this girl who isn't single but gives me alot of attention throughout the day and I'm unsure of how to proceed.