Hmm I can say the way they see me is the way i am whenever im with my friends and family. Siguro given na yung pagiging polite at yung may hiya ka, kasi it all boils down kung may hiya ka wala sila magiging problema sayo.
And hindi naman ata applicable na itreat mo sila gaya the way you treat your closest friends, magkaibang level sila sa buhay mo kaya i think yung pakikitungo in a way maiiba which i think is tama naman na ganun on my opinion.
ang mahirap is when it comes down to what you're used to doing especially at home that you think is ok but could be a nuance to some. add to that a certain length of time and eventually somebody breaks.
believe me, trivial things such as the way you eat, sleep, sneeze, cough, weekend habits, how you spend your money, volume of your footsteps, choice of clothes, furniture arrangement, etc. that your gf's parents don't usually see or notice will then be monitored since they believe they already have a 'right to say something' once you're married because their daughter's 'future is at stake' and they now consider you their 'son'.
so tama sabi mo na sabi ng friends mo, don't be too complacent. although it's good that they're the way you say they are and hopefully they don't 'change' too much if or when you do get married