If he does not know that you like him:
Something that goes along with his personality that would fit him the best!
If he does know:
Johnny Boy !
Boo
Yes, some girls like Boy Scouts. Some boys look really good in their uniforms.
Some common nicknames for Nicholas include Nick, Nicky, and Nico. In some cultures, variations like Klaus or Cole may also be used. Additionally, playful or affectionate forms like Nicko or Nicky-boy can be found among friends and family.
troy boy or Tdog
Pixinguinha went by Pizindim ("Good boy", and in an African language).
Some cute nicknames for Juan could be Juju, J-Boy, or Jay.
Common nicknames for Arthur include Art, Artie, and Arty. In some cultures, you might also find variations like Aart or Arturo. Additionally, playful or affectionate nicknames could include Artie-boy or Ace.
some nicknames for the name Cory are C-bear Core
Over the years, Jeff was called "Wonder Boy", "The Kid" and "The Rainbow Warrior".
If you like him, list off some qualities that he has and that he would feel good about having.
I like the name Laurence oliver or Lawrence Taylor