How to get a girls parents to like you?

I think you ought to stop trying so hard to MAKE your girlfriend's parents like you. You can never make somebody like you, with words alone. It seems as though you're trying to convince them of who you are. I would suggest what you do, is earn their trust. There are several ways you can do this. You can make sure you get your girlfriend home at the time she's told to be home... no excuses, no lateness... get her home five minutes early, if necessary but always stick to her parents' rules. Act naturally when you're around them, but be polite at all times, and ask permission to take their daughter out. Take flowers occasionally, for her Mum. Not every time, you understand, but once a month or something, but show your respect that way. How about asking your parents if they might invite your girlfriend around for dinner, accompanied by her parents, so that they can see what kind of a background you come from and get to know one another. Never ever distract the girlfriend from her school work, because if her work rate, or education drops, then you will be blamed, for sure. lol. Just treat your girlfriend, and her family with respect all the time. Be honest, abide by their rules and be polite. Dress nicely, and whatever you do... no swearing! :) Good luck... I hope this will be of some help to you. Brightest Blessings.