I am sure that every person would agree with the statement that says that what you say to others matters a lot. Therefore, a person should be careful what he says to other people with whom he deals. A few moments of carelessness can turn a day into a nightmare. The same principle applies to relationships. In your relationship with the opposite gender, you need to be especially careful what you say. You do not want to hurt somebody with whom you build a relationship. In order to make a relationship stronger, you might want to look at the list Sweet things to say to your girlfriend. You might get some creative ideas from a list like this one.