Just don't think about being red and be mature
No its not in their diet
yes!
that's normal
Turning red around girls is a natural reaction. Some girls see it as awfully cute.
If by face, you mean the cere (area above the beak, surrounding the nostrils), then no it just means that your female is not in breeding condition. I think parakeets more naturally breed in the spring, so if you wrote this anytime recently (ie winter), this is normal.
Parakeets do not become pregnant, they lay eggs. Females have a pink or tan color nostril band.
you could text, email, message(facebook/msn etc.) him :]
Yeah, although maybe not in all people. You know your face is turning red when all the blood goes up into your head, you feel a nerve climax in your brain, your nerves are just buzzling. That is true anger...
When we get embarrassed, our body releases adrenaline which causes the blood vessels in our face to dilate, allowing more blood to flow. This increased blood flow leads to our face turning red in response to the heightened emotion.
try by not being scared , ask him if he likes you
I don't completely understand but if you mean the thing above the beak is turning pink it means it's a girl.