Learning a new language...kinda

So, here I am two years almost since I started dating a Mexican.  This love of my life is so wonderful, and now I have the oppertunity to get to know his parents as well, and wouldn't you know it....I can't speak a damn little bit of Spanish.  What's wrong with this particular situation? 

1.  Even though I took two years of Spanish in college, I can't speak more than the really good four letter words.  Most that I wouldn't say in english, due that the fact that it would probably make me blush.

2.  Those are not the types of words you want to say to your future in-laws.  It is guarenteed not to impress them.


3.  I have bought all kinds of books.  Spanish for Dummies 1-4, Mexican Spanish Phrasebooks by Lonley planet, and signed up with an online school called Livemocha.com.  They are pretty cool, except, I seem to be having problems staying awake while I am reading them.  The online thing is great, but....

4.  I FEEL LIKE A HUGE IDIOT. 

I think this is what has kept me captive to the English language, not allowing me to venture forth into the language that will open up a good portion of the world to me.  Have I gotten too old to learn a new language? 

So, this is me, one week before my in-laws arrive, trying to learn more than cuss words so I can speak to his parents while they stay with us for the next month.  If anyone has any good ideas, let me know.