Should I Just tell her?

There is this girl that I have been talking to her for a month she texts me every day and calls me now and again and we see each other only on weekends at the moment, we flirt with each other back and forth but both of us just seem to beating around the bush I think she does like me. The other reason I wanted to be up front and get it out of the way is because her friend has told me she likes me I like her friend but I prefer this girl. I can be a little impatient when it comes to things like this hence why I want to be direct. Im hopefully going to bump into her tonight at a night club, should I just tell her that I like her and be done with it. Although I can see it being awkward because her friend will be there too.