He remembers the score of a basketball game three years ago but can't remember anything you talked about yesterday.

A man's relationship with sports probably started long before he met you. Guys have been watching and talking about sports for a long time whereas being in a relationship may be relatively new to them. In addition to a long-term relationship with sports, many men mark certain times in their lives as they coincide with sports events like the Super Bowl or World Series.

He always gets defensive when you say something negative about his mother.

As the first woman in their lives, moms will always hold a special place in a man's heart. Even if she's acting terribly, it will be hard for him to hear you talk badly about the woman who raised him. Your best bet is to grin and bare it and if you must broach the "mom" subject do so very, very carefully and gracefully.

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He acts like he doesn't like your friends.

Your man might come off cold or uninterested when meeting your gal pals but that's because he may not be able to keep them all straight. Guys tend to have a long-standing solid group of a few friends, whereas women probably have lots of separate social groups like college friends, co-workers, family friends, etc. He may not understand your level of commitment to each group so he isn't sure how friendly or invested he should get.