Normally we say "I love my parents", this means you always love your parents.
"am" + "ing" is present continuous tense, more for an action what you're doing "now". Cannot say "I am loving my parents" this sentense is wrong. It's more suitable if you want to emphais that you are loving them now and may not love them in the past.
When you're taking the eng oral exam, be more cheerful and nice to your examimer. Also, it's not a must to speak fastly. Speak fast doesn't mean your English is good, speak slowly and clear is more important.