Love you to the moon and back.... (sans x frisk)

Frisk is 18 and Sans is a boss monster so he doesn't age so he is like 22 in his years. Sans has liked Frisk for some time now and he has been trying to tell her but can't. This is where the story begins how will Frisk take Sans liking her? What will Sans do is someone interferes with his plan? FIND OUT WHEN I ACTUALLY WRITE SOMETHING! Well I ship Chara x Frisk so this is new to me but LET THE FANFIC BEGIN...... ummm I said BEGIN!