DENISE- NOT A FRIEND TO CONFIDE IN

I have to keep my guard up around her. And whatever I tell her about anything personal I always regret. She is vindictive and negative and a man hater. She even says she is a snake and this is not someone I want representing my side of anything. I will tell her something as a friend like .. we email sometimes 3 times a day and last night she used that against him. If Steve was running me around that is between me and him and not something I have to defend for myself. She confronted Rob while I was upstairs changing and told him what do you think you are doing, you are not meeting her needs... he was so furious for being called out that he never came back. She sat there and asked him 50 literal questions, insulted him by asking questions that she knew he would say no to belittling him infront of me and he was angry with me for not stopping it sooner than I did and throwing her out of my house. She told my husband - one time I made the comment at 19 that I had these levis on the first time.. she told Marty in front of her family that I said that. It's like no one is allowed to be happy because she is not happy and she oversteps her bounds. Denise is hard and a man hater and loves to confront people and those qualities are what is barring her from love and from ever being a mother. I realized that I can't share anything about Steve with her because she will turn it around and use it to make him look bad, sabotaging me so that I won't have any happiness and therefore leave her to be single by herself. I have my doubts about Steve, but he always comes shining through and Im not ready to push him into an ultimatum. This is my choice and my business and whether we are platonic or lovers it's my relationship and not hers. This is not something I want to share or discuss with anyone so just hush up about it. All Im doing is defending him because everyone thinks he's leading me on. We're not together or having sex, we are friends over the internet so he is not doing anything wrong. I don't want to explain something that is only my business and Crissy is the only one I can talk to about Steve so I just have to get it straight that I don't discuss Steve with Denise because she really isn't a confidant and she isn't looking out for me- it's just fun meddling in my business and I leave myself open for her to insult Steve with what I say. I don't ever want her around any man I care about because in 5 minutes she will attack him and undo anything we have together. She's a know it all and took joy in telling me the first engineers had a 4 day holiday furthermore pitting me against him so we can hate him and all men together. She is not a friend I want to confide in. I have to lay the rule down that this is between me and him and Im not dragging everybody in the middle. Good or bad this is something that I don't want to share with anyone except my sister because she understands and I can trust her knowing she genuinely looks out for me and can keep a confidence.