Affiliate Marketing Secrets

There is a long story affiliated with this, but here’s the short version:
I have worked with this girl for 4 years.
We have been as close as “work friends” can be, but the over last couple of months we have been distant.
We never saw each other outside of work.
We have always taken interest in each other’s life. But we have barely made any physical contact (we are both awkwardly shy).
She has always had a boyfriend since before we met, so I’ve never made a move on her. But, I’ve never really hid the fact that I like her.
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Here is the important part:
She stayed after work for half an hour the other day just to talk to me (I was still working). We caught up a little bit, as we haven’t seen each other in a while.
In that timeframe, she found at least 5 reasons to touch me and hugged me 3 times.
That was weird to me, because she has never been the touchy-feely type. I think she is still dating the guy, but do you guys think this has any meaning? Should I go after her?