I am not insecure in the least. I met my husband when i was 18 and it was love at first site. We have been together 23 years so far. Got married while in college, we have never felt threatened by each other's friends. EVEN I would have had an issue with him talking to my friend all day long. Her not getting it is another separate issue but as for him you have every right to explain that it bothers you. Be prepared that he may not change but you are allowed to be bothered by it.