Anyone can have an idea. I think it's more important to act on them. I strongly dislike Zuckerberg, but he called 10-15 friends about his idea about FB, only 4 showed up and 2? helped to build it.

I told my friend about an idea, she always rejects it. Now, I don't even bother to tell her about it because I know the obvious answer. Then I told another friend, and she got on board to help. Your friend should have encouraged you to help build it. Ask them, why did you leave me out of this? Let him or her tell you honestly, and suggest building it together, and that you're happy to have someone on board.