Anne and henry have been dating for about six weeks and have gradually become closer. they want to spend more time with each other, so they've decided to start dating exclusively. this interpersonal relationship is [personal-social or professional functional] based on knapp's model, anne and henry's relationship is in the stage [experimenting, initiating, intensifying, integrating, or bonding]

This interpersonal relationship Anne and Henry have is Personal-Social, in which the individual evaluates himself and the person with whom interacts.

Anne and Henry currently are in the intensifying stage of the relationship, based on Knapp's model. in which the interpersonal relationship begins to develop and the expression of feeling becomes more common.

They previously performed the initiating and experimenting phases, which represent the following acts:  they already smiled, made eye contact. they experimented shaking hands and body language, bought a drink to share. they already called on the phone or visited each other. they already ate a meal together. they have gone on a date.

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."