1. I love our car rides.

Whether it's jamming to "Look What You Made Me Do" on the way to the gym or getting lost on new roads, I always feel happier when I look in the rearview and you're in the backseat gabbing away. You make road trips (and my driving) 100% better.

2. You make commuting to school worth it.

As tedious as commuting to campus is, I'm grateful because it means I get to stay in your life longer. I was worried that going to college would mean I'd be that older sibling you barely know, but it doesn't look like that will happen any time soon. Plus, Mom gets a convenient chauffeur.

3. Your wedding reception will essentially be sibling payback.

Remember all those diapers Mom made me change and all those hours of "Paw Patrol" you made me sit through? You have no idea what's coming...

4. I'm sorry for all the times I've told you to stay a baby.

Know that when I say this, I only mean the best. More than anything I want you to grow up into the person you were born to be, but I also don't want you to make growing up your first priority. Enjoy being the little guy while you can—the benefits are endless.

5. Being mistaken as your "mom" is one of the biggest compliments I will ever receive.

You are the cutest little bundle of tantrums and joy on planet Earth and I am so blessed to be your big sister. You make me proud to be mistaken for your mom...

...excluding that one time when the ShopRite cashier thought Dad and I were your parents. That was a little too weird.

6. You will never not be the baby of the family, but that's not something to whine over.

Embrace your "baby" status: it means special treatment and lifelong adoration.

7. I cried writing this.

Toby, you'll always be that eensy little bundle in the hospital room I was too afraid to hold for fear of dropping you. Four years feels like forever already and you'll never have to worry about making your family proud, because you already have.