Holding hands with coworker?

So my female coworker sometimes grabs my hand and holds it when talking to me. I haven't seen her do this with others. We get on well and we have done a couple of things outside of work together but I wouldn't say we were close as normal non work friends, like we don't text or call each other. I feel like her behaviour could just be seen as friendly but at the same time she is a coworker and I haven't seen other coworkers do this with each other. Could this be that she like me 'likes me' or just affection? She does like to touch my arm a lot and hair and stand so close right in my personal space but again can this just be put down to affection?
Holding hands with coworker?
Post Opinion