The phrase "one's sweet boyfriend" is an informal expression used to describe a person's romantic partner who is kind, caring and affectionate. Full definition
One of my friends gets mad at her super sweet boyfriend because he never writes on her wall. (welovedates.com)
Sometimes my super sweet boyfriend will do it for me, but when he doesn't, my handy dandy dryer does the trick LOL! (thebeautybeau.com)
Afterwards, my sweet boyfriend (who puts up with all my craziness and definitely deserves some type of medial or plaque) and I got Mexican food and watch more Olympics until I no longer could keep my eyes open. (ahappyfooddance.com)