You might also want to talk about this with other friends who may have gone through something similar. You get along well with your parents, but they tell you that they don't like some of the friends you bring home. You don't think that's fair, but you don't want to go against them. You may feel angry. While you still need to respect their rules, getting angry or just walking away from the situation won't solve the conflict.
Conflict is healthy in any relationship.
Remember, a relationship involves more than one person. We are all partners in any relationship, regardless of how we feel about the other people involved. They deserve your respect, and you deserve theirs.