Tips for being friends with your ex?

I think you should stay clear of your ex. It sounds to me like she only wants to have a friendship with you because she knows you have found somebody else who is being true and faith full to you and is backing you up 100 % and shes jealous and cant stand it. My ex tried the same thing with me and it only caused heartache for me and my new love.You should tell her that you are happy now and don't need her drama or friendship.Thanks but no thanks. I hope you and your new girl friend have a long and happy life together.