Can I hire an attorney and serve her with divorce papers without any money?

she is disappearing on weekends and claiming to be working late. She never answers her phone and I also found out by checking phone records she has been talking to another man for sometime. It's affecting me and my kids and disrupting our household. She keeps telling me she is not happy and that she loves me but not in love with me. When I approached her about the number she gets angry and defensive and says no of my business. She also came home with a bouquet of flowers with some roses in them and even threaten me a couple of times. She has made me lose several jobs in the past because she can't help with the kids and is always using her job as a alibi. I need help fast I also have other evidence that proves she is having an affair but I have no money for a attorney to represent me. Please help me..