You're a different person than you were, obviously. Which isn't necessarily a bad thing in itself; while our core selves tend to remain the same, people are always changing.

[He pauses; they've come to another fork, and hesitates for a long moment before heading to the right.]

If someone has the power to manipulate other people's memories, they can potentially shatter that person's heart. If one is very lucky, it's survivable. But it's not something I would worry about, if I were you. Only one person here has that ability. What Xehanort did was rather more worrying; he actively removed people's hearts.