First off: Im 15 years old...
(this is MY OPINION, and I'm not your doctor) I don't recommend this to anyone under 21 because your body hasn't fully developed and there has been no study as to whether this will effect your growth process, etc. You are an athlete, and if you wish to continue to be an athlete, just be patient and give your body time to mature before taking in chemicals that aren't necessary. You'll thank me later.
Would it be safe to just call this a "tea" not a "drug".?
You can call it a tea if you wish, but be aware that this tea contains a mild psychadelic drug. [BUT, 'table sugar' is a drug, too. It's also mildly psychoactive, and it's chemical compound is C6H11O6.] But look, most herbal teas are drugs. 'Sleepy Time Tea' (a popular brand worldwide) is drug-packed, but my grandmother, wife, mom, dad, and minister all drink it.
Is this going to make me loose my mind, or will i hallucinate if i just drink it?
You will not lose your mind just by drinking this stuff once in a while. You MAY have mild auditory hallucinations just before you fall asleep, but they are not unpleasant, and they don't 'freak you out.' It's just like you are half in, and half out of dreamland.
Will i start to do bad in school by drinking this?
If you become obsessed with anything, your obsession can lead you to do poorly in school. However, this plant will not make you do poorly in school. It does not 'un-motivate' you like marijuana (I think that was your REAL question, right?)
Will this effect my running ability?
I don't know, but I presume that it will not if done occasionally (not more than 2x monthly on average) and if you don't become mentally obsessed with the plant. Remember, Chontal Indians use this regularly, and I'm pretty sure they're fairly athletic.
Are my parents going to kill me if i want to buy a "herb" kind of "drug" off the interent?
See the first paragraph. I don't recommend this for you, but that's just my opinion. BUT if you ARE going to use this, try doing something very mature. Go to your parents and tell them you are interested in lucid dreaming and you heard that this plant can IMPROVE cognitive functions (similarly to ginko biloba) and you wish to try it AS A SUPPLEMENT under their supervision. I don't know your parents, and I don't know your relationship with them, but most parents are not only respectful, but outright ecstatic when their offspring try to involve them in their maturation process. If you approach this right, you might get your parents' cooperation. But it depends on them, and your relationship with them.
Will this damage my liver as do all drugs?
All drugs do not damage the liver. This will not damage your liver if done in moderation and you do not have any pre-existing liver problems. To assure that you don't harm your liver, follow up the next day with cranberry juice (the real stuff) to detoxify. Also, just don't indulge in the stuff on a regular basis. Take a week or two off after each successful use. It hasn't been established whether C.Z. contains alkaloids at all, but it's possible. Alkaloids can be 'heavy' on the liver, and detox is a good idea.
How much of the crushed up calea would i put in an empty dispossable tea bag?
About 2.5 to 3 grams is a good starting dose.
Should i drink it right before i go to bed?
Yes. Drink it about 30 minutes before bedtime.
Does it make you "high"?
Only if you smoke a cigarette of it along with the tea. Otherwise it just makes you relaxed and very aware. In otherwords you might seem more 'with it.'
Will i become a "stoner"?
LOL. No. And what's more, people DECIDE to be stoners, unless they get hooked on harsh drugs like heroin, cocaine, etc. Being a 'stoner' is a mindset, and it's a sense of irresponsibility. In other words, that has more to do with your psyche than the drug. MANY marijuana smokers are responsible citizens, ceo's of corporations, etc. Others are druggies and potheads (aka useless people who are just irresopnsible and use the drug as an excuse to be useless.)
Will my mind begin to contradict itself?
Only while under the influence of the stuff would that be possible.

And you'll be asleep so who cares?
Will i live in another reality?
While you are dreaming, perhaps. But while awake and not under it's direct influence, no, unless you use the drug as a crutch or excuse to do so.
Will i begin to listen to the beatles 24/7?
If you're lucky.
Will i start wearing nothing but tie dyed shirts?
Nahh.. That requires stronger psychadelics like 'shrooms' or 'acid.' LOL Unless, of course, you like tie-dye a LOT.
I want the vivid lucid dreams this plant gives, but i dont want to get into any conflics, with myself, my parents, my friends, my cat, my sister.
Good. But remember, this stuff makes you a more relaxed, balanced person if done correctly. It does NOT promote a combative attitude at ALL. Also, if your family understands what you are doing and WHY, then there will be no reason for conflict. Also, this does N O T lead to the use of other drugs as the LYING FDA would have you believe about ANYTHING THEY DON'T CONDONE. I do not see how it's even possible to become addicted to Calea Z.
IS THIS SAFE? WILL I DIE?
It's safe unless you are highly allergic to the plant and suffer from anaphlactic shock. Use the allergy test in the initial post in this thread to avoid such an event.
Ok so im paranoid, so, what do you think davion?
There is a big difference between paranoia and responsibility. Your post illustrates a high level of responsibility as well as a desire to educate yourself first. I am proud of you and impressed that you asked all those questions first.
He who owes nothing is rich enough.