Do you think it is OK to let a person in a relationship know that you are interested? Some people I have talked to are of the opinion that this is never a good idea, and that it may cause problems for the couple. Still, I find that many people switch to a new partner with little or no break in between, so there must have been some 'pre-signaling' going on. In my own opinion, it is fine as long as you are not being "pushy" or annoying. Some bad relationships may actually need a wake-up call like this to realize that things are not working properly. If a couple can't take the fact that others are interested, then the relationship may not be worth preserving. However, it may also lead to some jealousy even in the best relationships. Also, don't expect to keep your previous friendship with the couple intact*. What do you think? *My own opinion of this when I was single was quite cynical. Basically: "friendship be damned, I want a girlfriend."