sometimes it happen to me to catch a girl that i really like....for example she is pretty ,smart and of course many boys want her.
when i go out with this kind of girls i'm very happy
(i'm talking about students that stay in my city just for a month or 2 or 3 so i already know that they will leave)
the problem is that they are always busy so for example we say ok if you can't tonight we will meet tomorrow.
i stay the whole day thinking of her and i get anxious because i know that is not sure that she will respect what she said and maybe won't be possible to see her.
so when i call her i'm very nervous and then she say she can't and we will meet the day after.
maybe the day after i meet her but then the next time is the same so i spend a lot of time thinking of her,hoping she will say yes and then maybe i see her just three time in a month.
do you think this worth?
or at least how should i do to take this easy enjoy and don't think to much?

Please refer to the 40 year old virgin.

I think they say something along the lines of..

"fuck as many girls as you can before you fuck the one you like, so when you fuck the one you like, youre a master at it."

meaning stop stressing over one chick dude. Just go out and approach as many women as you can. You sound young, so go out there and enjoy yourself!

Agreed.