Sure, some parents are looking for faults, but most just want to make sure that their son is in love with a sane, sweet person. Keep these things in mind when you meet his parents
Discuss it with your boyfriend: They’re his parents, so, of course, your boyfriend knows them well. You should try to find out what they do and do not like in people so you know how to act around them.
Dress well: Girls, no cleavage-baring dresses, short skirts or stilettos. They don’t need to know how fashionable you are.
Treat them with respect: Unless they’ve done something terrible like abused your parents, you should treat them with respect. Respect goes a long way, and you might find them being able to open themselves up easier to you.
Bring gifts: Gifts are a great way to show how much you like someone. Find out what kinds of things your in-laws are into, and give them presents. Make sure you remember their birthdays. That always impresses people.
Talk to them: Don’t keep to yourself or stick to your boyfriend when you meet your in-laws. Discuss what you both have in common. It will lighten the atmosphere, and you may be surprised to find how many similar likes you both have. Try to avoid arguments, as that can quickly turn into bitterness against you.