The important thing is simply to tell the truth.

Also, I believe you will be permitted to take an adult along with you. I would definitely do that, as you will have company and not be so nervous.

If one of your parents isn't accompanying you, then it should be a person who is related to you and knows your situation well, preferably the one who is responsible for you in the Phils.

They should make sure that they are appropriately dressed and have IDs to allow them admittance to the Embassy.