Pick-up lines can be fun and lighthearted, it's important to be  respectful and gauge the other person's response to ensure you're making  them comfortable.

"Is there a rainbow today? I just found the treasure I've been searching for."

"Are you a supernova? Because you just exploded into my life with dazzling beauty."

"Do you have a time machine? Because I can see us in the past, present, and future together."

"Are you a puzzle? Because every time I see you, I want to piece together our future."

"Is your name Autumn? Because you're a season of change, and I'm falling for every shade of you."

"Do you believe in parallel universes? Because in every one, I'm still falling for you."

"Are you a bookstore? Because whenever I'm around you, I can't resist getting lost."

"Are you a campfire? Because you're making my heart glow with warmth."

"Do you have a name, or can I call you the highlight of my day?"