...the company he keeps

Sure, a company your man keeps is the most significant indication of his character. There is no way for a man to be a friend for people he dislikes. It would be wrong to say that there are only the good people among those, who surround your man. There are also people he has to be friendly too as except the desire there is duty. And that is the duty that makes people be acquainted with those they don't like. Talking about a company he keeps, we are talking about those people you see next to him during weekends and those he visits football-matches with.
Take a good look at people you man calls as his friends. Take a very good look at them and realise that it is your man you are looking at. Never blame his friends in his attitude towards you. There is no such friend who would be able to suggest your man his own attitude towards you. There is also no such friend who would be able to make your man do things he doesn't want to do. There are only friends who can reveal the real nature and character of your man.
Ask yourself: will you be a friend to one you don't like? I'm sure your answer is "No". This is the answer everyone will give to this question. So, a man you are in love with will also give this answer. As you can see, there is no for one to call as friend a person he or she dislikes. It is not true that extremes meet. Two different people we never become friends as they will never find the mutual understanding. A thief will always be a friend for thief and will never be a friend for a cop. So, if you see a double-faced scoundrel you man recognises as friend, you'd better reject your belief that your man is the most honourable man in the world.
A good wife will always do her best in order to find out more about friends of her husband. Though, sometimes it is too late to care about them once you are married. It is a good idea to bother about this problem once you met him. Ask your man to get you acquainted with his friends and you will find out everything about him. First of all a man always has friends who are the people of the same character. Sure, there are differences between then but in general they are rather alike. It is obvious that he wouldn't be a friend to some of them in case if there were no common interests between them.
If a friend of your man is a ladies' man be sure that your man just like that or at least a bit like that. They used to have fun together for sure, and that "fun" never was the womanless-fun for sure. People say that habit is a second nature, so it will take a number of efforts for you to change his nature. In most cases it is impossible to do and it is better to live him alone. You also can assure yourself that he loves you much and will never hurt you. Sometimes, things are just like that. But still, if you see some shortcomings of your man's friends take a good look at your man, maybe he has the same shortcomings.