<human>: [29M] I've only been with one girl (we were engaged) and this was for 8 years and I broke of the engagement at the of last year. 

It worth noting here, that I over analyse everything and get anxious, hence this post.

A colleague at work [28f] who I was on talking terms with, started flirting with me a couple of weeks ago, including spending more time together, physical contact, (the usual signals) etc She isn't like this with anyone else from what I know of her and have seen.

We exchanged numbers and have been texting, each evening over the last week, both of us has been initiating contact. The last two evenings have included, whilst we were both out drinking (myself last night, her tonight) but maintaining contact with each other. We currently have plans to go out for drinks soon and I have been offered a place to stay by her that night. 

This evening during text she mentioned that she wasn't sure how she was going to get home, whats my advice, being kind I offered to pick her up, she politely declined saying 'as lovely as that sounds' I responded with an honestly I don't mind comment, and not heard from her since.

Have I messed up now, one theory is that she was seeing how much I like her, and the signals before suggest that she does like me. But now anxiety is getting the best of me and I keep thinking i screwed up and worried that she won't want anything to do with me now.

Condense the text into a few key points
<bot>: only been in one relationship, girl seems interested at work, have i messed up by being me and trying to be a nice guy