He's not the most articulate person in the world. He probably wanted to express his love for his daughter on Valentine's day, the day where lots of people express their love for someone.
Granted, the word 'girlfriend' is not the best one he could've picked, but I'm sure he didn't mean anything inappropriate with it. She turned it into something nasty just to hit back.
Most parents got what he meant though, it was a sweet thing to say. So many people see bad in everything now.
Giraffe neck Chantelle needs to get a new man now to play victim to and leave Alex alone.