Is it a good idea, or alright to wear this....?

I am going with my cousins to see the hangover 2 opening morning (?) and his one of my cousin's best friend (my crush) is coming. I want to wear a cami, just a cami and skinny jeans. It's low cut, but not too low like "OH GOD PUT THEM AWAY!" and the shirt compliments my figure. I have DD's so a little clevage will show- I've worn camis before all by themselves but I just feel different wearing this one- it's plain brown and forms to my torse- i usually wear loose ones. Will he think im slutty, he's in college and a drinker and partier- i'm a senior in high school. Thanks. :) ((And i'm really conservative when it comes to cleavage so i'll cover up haha)