Ok, I NEED HELP! Please! I want someone who know facts and who can help me.?

And I don't want any crap like "Your body goes into starvation mode and you get fat."

I'm 14 years old, 5'5", and weigh 130 lbs.

How can I lose around 20-30 lbs by June?

I'm on a rowing team and I workout 5 days a week, so I work out a lot.

Please help! Thanks!