Okay so recently my boyfriend broke up with me because he found out that I was going to the movies with another guy, (which I was never going to do anything with that guy), so he got jealous and broke up with me. So my best friend, (I now call her my ex best friend), started wildly flirting with him and there are rumors that they are now going out. It hurts so much, because me and my boyfriend were doing great but he thought something was going on so he broke it off for a false reason. You can read more about that in my other question...

My other best friend, Isabella, she tells me to move on with the guy that I was going to the movies with, Kaden. Everyone tells me to go out with him. He apparently tells his friends that he thinks he's "in love" with me. He's very polite and good looking, but I don't want people to think that what I had with my ex boyfriend was fake and I'm a player...
Not to mention if my ex boyfriend finds out, he will think he was right about breaking up with me. My friends tell me to move on, and I believe that they are right and I want to. Should I go out with Kaden? Why or why not? Thanks!

Why were you going to the movies with one guy when you were going out with another?
Your ex is now your ex. If you are that worried about what he and others will think, you would be doing this guy and injustice by dating him.
But the truth of the matter is, you were cheating on your boyfriend

Kaden is my friend. We were both very excited for The Avengers, so we both saw it. Seeing a movie with a friend is not cheating. But I do thank you for saying that I shouldn't care what my ex says, because you're right on that part.

Well, it sounds like you were just wanting to see a cool movie with a friend? Would it be considered cheating if it was two guys, probably not, but that's beside the point. You let your boyfriend whoever he will be know where you are going. The ex boyfriend might have assumed because he was worried you were leaving him or some other reason he had thought of. I think you should go with your friend and work things out and later if you want go out with Kaden. Sounds like a nice guy and doesn't matter what your ex boyfriend says. You should choose on your terms and own feelings.