I'm only 16 and constantly throughout the day, my eyes just get this weird heated feeling and I feel like they might be turning red and starting to water although they look normal... is it like an eye pressure problem or something?

Your eyes may be getting too dry. Or you may not be blinking enough. That is natures way of lubricating the eyeball. If you wear contacts check with your optomitrist about a good solution ( eye drops ) for your eyes.

When was your last eye exam? CalifDad is correct, that could be an issue.