Need help regarding my boss.

I work for a small company, and technically she's not my direct boss, but she is 2nd in command in the company.

Me= male Boss=female

Recently we've become really close, we started talking online after work.

two weeks ago after talking online we made plans to go eat dinner together. A couple of days after that she texts me and we end up texting each other all night. We've been texting each other on and off afte that. To the point that this Friday we're going to a concert to see a band we both like.

Yesterday, she went home early because she wasn't feeling well. While taking the train home she starts to text me, so instead of working i'm answering her txt messages at work. After I get home I text her to see how she's feeling and we end up txting each other all night again. Today she didn't go in to work , and we spend the majority of the morning txting each other back and forth.

A little backstory, there was a rumor that I was dating a coworker, I let her know that absolutly nothing was going on between myself and and coworker_A. While speaking with one of the coworkers that she asked if there was anything going on between myself and coworker_A, coworker_b told me that she was possibly interested in me.

Something else, no one in the company knows that we've been txting each other let alone hanging out. As she isn't really liked that much at work.

So R_A, need your advice on how to proceed. Don't want to mess this up.