coquetear---------------------to flirt
corresponder----------------------to return/share affection
enamorarse de-----------------------to fall in love with
enrojecer--------------------------------to blush, to turn red
proponer matrimonio-----------------------to propose marriage
quedarse viuda(o)----------------------------to be widowed
romper con------------------------------to break up with
salir con-----------------------------------------to go out with
tener celos de---------------------------------------to be jealous of