Text him, to stay the phuque away from YOU.
Sometimes (not always, but usually) when our instincts send up a red flag; it's there for us to take notice.
I am friends with some of my ex's. I dont think its a problem unless there are bad intentions there. There was a reason why i got with them in the first place. they are nice people. They tend to know you better than most and its good for when you need advice. anyways..good luck with it. everyone is different and have there own preferences
not necessarily. I have been married 20+ years and my husband rings his ex gf at xmas. I encourage him to otherwise he expects me to send a xmas email to her. I'd rather he ring and have a nice chat with her.