I cannot understand the exact meaning of this sentence in the following:
Remember, too, that the words "I love you, I like being in a relationship with you. ..." are not demands and need to be said occasionally in any relationship.
In particular, I am ambivalent about the meaning. Does it implies some obligation for saying the words (even occasionally) or it tells the reader to relax and only expect these words to be said occasionally. I appreciate if you provide a grammar hint that would be useful for me in the similar sentences as well (probably something related to need to).