Khloe Kardashian recently shared a heartfelt message about her daughter True’s transition into the new school year.

The 40-year-old reality star took to Snapchat on August 26 to express her emotional reaction as True, her 6-year-old daughter with ex Tristan Thompson, embarked on her first day of first grade. Khloe admitted she was struggling with the reality of seeing True grow up.

“It’s always such a rollercoaster of emotions when True starts a new school year. This year is a big milestone for her… first grade,” Khloe wrote. “I’m not going to lie, I am having a really hard time processing the fact that she’s going into first grade.”

Khloe, who also shares son Tatum Thompson, 2, with Tristan, described feeling a mix of pride and sadness. She noted the “strange mixture of loss, anxiety and fear” that accompanies such milestones, expressing a poignant sense of missing the younger versions of True that are gradually giving way to the person she is becoming.

“There’s this undeniable feeling that I’m losing parts of who she was with each day that passes,” Khloe reflected. “The little parts of who she used to be are being replaced with new parts that will make up the next little amazing person she will become. And I miss her. All the little versions of her who I used to know. Time moves fast, faster every year it feels like, and this new school year is a reminder to me to fully embrace every moment and soak it all in.”

Despite these emotions, Khloe expressed excitement and pride for the daughter she sees growing before her eyes. “She is more than I could ever have dreamed of in a daughter,” Khloe continued. “Seeing her grow makes me excited for the years and experiences ahead.”

To celebrate True’s first day of school, Khloe surprised her with a festive rainbow balloon arch and a giant sculpture of rainbow-colored crayons. True posed happily with Khloe, her brother Tatum, and their family cat, Grey Kitty.

“First Grade!!! True I am so proud of you!!” Khloe captioned her August 27 Instagram post. “I know you’re going to have the most incredible year ahead of you! I couldn’t be happier for you my angel. I’m not ok but I’ll pull it together by pick up time.”