以外呢兩個詞既英文係???

花心: unfaithful, perfidious, Don Juan, libertine, philandering, casanovanic (casanova), playboy


用情專一: faithful, devoted, loyal, unswerving/unwavering/steadfast love, one-girl guy

花心
- unfaithful
- see one love one (just jocking!)

用情專一
- Stable & faithful about love

花心
Stamen

用情專一
Is single-minded with the sentiment