<human>: Everyone thinks I'm crazy but I don't see why it is.

One of my friends used to be into my girlfriend before he met me, I met him from her telling me about how he asked her out. I became good friends with him and have been ever since. In fact both of us have been.

I don't mind her meeting him for lunch sometimes and they text each other about life. I talk to him and go out with him too.

Someone told me its like they keep each other on the back burner, but I don't think my relationship suffers from it, it's fine. Nothing is under the table and they don't do things secretly.

I probably made the mistake but I asked what she thought of him in that way, she said she has and thinks he's attractive, but she has me and those are just thoughts.

That probably would turn off a lot of people, but I think that about other people too.

Am I the crazy one?

Can you give me the gist of the text in a nutshell?
<bot>: My friend used to like my girlfriend. She said no because of me. We all stayed and became close friends together and separately. Other people make me very weary of this. Should I?