Depending on what you're anticipating—a date, a vacation, or a big event—here are a few ways to phrase it:
: "I'm having a hard time focusing today because I'm so excited for [Event/Date] with you." For Travel and Vacations anticipation
: "Just thinking about [Dinner/Tonight/Friday]... I’m officially counting down the hours until I see you." Depending on what you're anticipating—a date, a vacation,
: "I have a surprise for you later... but you’ll have to wait until I see you to find out what it is." Depending on what you're anticipating—a date
: "I woke up with a big smile today just thinking about our plans later. Can't wait!"