My best friend is dating a guy who is sometimes a nice guy but most of the time he is not nice at all! He keeps her all to himself and won't even let her friends call him. She is very sensitive and I'm afraid to say anything to her for fear that she will not want to be my friend anymore! Also she has been acting weird lately, she gets mad and upset easliy and it seems like she does not even want to be friends anymore!

There's nothing you can do. The decision is on her whether she's going to stay with this jerk. Express your feelings, and if she doesn't want to be your friend just because you're looking out for her, then so be it. You will find better friends.

Keeping silent is the worst thing you can do. If he has her isolated from her friends (probably her family too), she could be in a relationship that she doesn't know how to get out of. Afraid to go, afraid to stay.

Let her know clearly that you care about her, and if she needs you, you'll be there. You may very well end up a lifeline, when she does decide to go.

You're a good friend for caring so much.

Try to talk to her. She's your friend and friends stick together.

She may already know she needs to get out. Your words and your gesture of caring may be the key.

Maybe just maybe she needs a friend who is a good listener.

If she won't talk to you about it, write it down and send her a letter. Tell her what your observations are but try not to accuse her boyfriend, she will only become defensive.

You could remind her of the fun you have had, the importance of good friends, and that you miss spending time with her. Let her know you will be there for her any time she might want to talk.