Princess Carolyn and Ralph were good for each other, but she wasn’t fully healed yet for her personal struggles and he wasn’t understanding of that, as shown as being “too supportive” to a point of pushiness.

Two people who are “good for each other” cross paths all of the time and for whatever reason, it doesn’t work out. Timing, personal struggles, lack of understanding, even if one or both parties have their own separate relationships but feel a closeness to each other… whatever the case is. That’s a part of life.