Replying to Bro Code Question

Alright, I've got a bit of a situation on my hands here, and I've decided to turn to you guys for help. First though, some background information is needed.
Near the end of last summer, this new girl started working where me and my friend chad work. She was pretty hot, and really nice, so I decided I was going to ask her out, but I was going away on hollidays for 2 weeks. I had told chad, as well as a few other people about my plan, but when I got back, I found out that chad and this girl were going out. Anyways, I still decided to be friends with the girl, and talked her through a lot of the times where chad was a dick to her. About a month ago, they broke up mutually, and recently, this girl has been acting like she really wants me, suggesting just the two of us go out places, etc. So I'm wondering what the best way to go about this is, since I do wanna go out with this girl. Should I talk to chad before I do anything? Should I wait a little longer? Hopefuly you guys can help with this