Explaining a problem

My best friend had a problem recently. He's going out with a friend but she isn't really interested in the relationship and she flirts with other people when my friend isn't there.
I'm really angry because the girl is my friend too and she doesn't mind hurting my friend. I think I should talk with her and they would be much happier. But I think I shouldn't interfere, but if they don't talk, they will split up and my friend will be depressed.
I'd really need some advice because both of them are my friends and I don't want them to be angry.

Guyanne française

The Internet

The internet has changed the world since 1960, when it was invented. Before this, when you wanted to search information you has to use books. But now you can do more than this, with the Internet you can search information, listening to music, to read some books...
Books, in the other hand, are old-fashioned. Nowadays nobody uses books to search information.
The Internet, however, is dangerous because you can tala with everybody bus sometimes the people who you are talking to, aren't who they seemed to be. You must to be very careful when you are surfing on the Internet.
All in all, I think that the Internet is much more useful than books.