It’s very important to understand the difference between two people who are compatible and two people who have no sparks. If a friend’s new love affair has you concerned that they are settling for less than they deserve, you have every right to say something. Of course, you have to muster up all the tact you can to do it. Flattery is always a good idea. Once you remind them how incredible they are, they will start to see how this new person might not be all that great.