Dont ask questions you dont want the answers to

You know I have an issue. How do you know what to say and not to say to people? I mean people are always saying, oh you can talk to me and I'll be here for you or yeah you can talk to me about anything, and then when you open up to them its like a slap in the face..cuz obviously their not as open minded as they said they were. It just sucks. This is why I dont open up to people cuz whenever I reach out and take the chance to be open with someone about what Im feeling or what Im going thru I wish I never have. Well..it wont happen again. Theres very few people I can openly talk to in this world and it doesnt take all 5 fingers. I'll just stick to talking to those. I just cant deal with close minded people. Only gives me more reason to stay hidden in the dark. Thanks for nothing.