Heating Me Up

Inciting anger or irritation.

“Alright bro, now you heating me up.”

Feeling the heat go up my body

A figure of speech to signify how someone feels when they're nervous, anxious, worried, afraid, ashamed, or even shy.
This is typically an unpleasant feeling, because you will see something that hurts you, worries you, or scares you.

I am feeling the heat go up my body whenever I see a picture of that girl, because I miss her terribly, but I know at the same time that she doesn't want me, so I will never get the chance to be with her.