Do you tell others who they should or should not date/marry?

I absolutely believe a person should feel free to make concerns known to a close friend or family member. If you have a valid concern about a person's behavior or personality don't waste time - tell your friend. Be careful about the approach though. You don't want to seem like the jealous or paranoid friend. I just casually express surprise in someones' choice of partner, like "I never would have thought you would get involved with someone who thinks that." What is most important is to ask yourself why you feel you need to get involved. It's one thing to think your friend's new boyfriend dresses like a slob. If he treats her with respect and she is blissfully happy then you might need to get over it. If there is any concern over a friend's safety, then please try talking to your friend and offer your support