dere-dere
Being openly and excessively affectionate, often in a way that makes others cringe. Acting foolishly infatuated.
💡A man fawning over a pretty waitress — 'He was dere-dere the whole time she was at our table.'
彼女の前ででれでれしている。
He's acting all dere-dere in front of her.
He turns ___ whenever his girlfriend is around.
彼女がいると彼は○○になる。