<human>: Hi. So I've known this girl since forever, but never really became friends until grade 10; we're both in 4th year now. 

Over the past year, I've fallen for her. I go to school quite a ways away from home which is why I've never asked her out or anything - logistics of long distance just don't really work for me. However, since I'm graduating and moving back to the same city coming May, I am going to be telling her how I feel.

The thing is the timing; basically we've decided on going to Europe together for a vacation a while back (we're from North America), but this is in July. I don't know if I should tell her how I feel before the trip, during, or after....

Obviously, if I tell her before and it works out, then the trip will be amazing. But if I tell her before the trip and she doesnt feel the same way, I'm scared that it'll ruin the trip for her which is something I am not prepared to do (she's REALLY excited for the trip.)

what do?

Thanks :)

Summarize the given text in a few sentences.
<bot>: fell in love with a close friend, going to Europe in July together for vacation. Not sure if I should tell her how I feel before the trip or after.