I get really nervous when i present a presentation to my cl, i only have to say like 3 paragraphs.?

I only have to present like 3 paragraphs, but i freagin break down, i cant even remember what i was gonna say and i freak out, i feel like i just wanna run out the cl door and never go back in, can somone tell me how to stop this... i have to present tommorow and i dont wanna feel like this or look like an idiot in fron of my frinds!