invite ex to your wedding?

Well if you and your ex are in good terms already and your fiance is okay with that why not. But, for respect maybe I would not since I believe there is something that is left in your heart that may affect the mood of your wedding. I think you should consider the feeling of your ex before inviting her to your wedding.

yeah im going to invite them because they've shared their life to me to learn more things even though were not meant to be.

I think a person must always consider the feelings of their new partner first of all even if they are still good friends with their ex, I think it is a caring thing to do to always think of the new partner, I don't think there is enough of that these days..