Given that you were "on holiday" I'm assuming you're not from the US, let alone from New York. You said he's Brazillian but not if he's actually living in Brazil at the moment or living somewhere in the US or whatever country you're from.
So I'm just going to assume you're both from opposite corners of the world. Let it go. Long distance isn't worth it for a stranger flirting with you at a bar. There will be more strangers flirting with you in more bars who live closer.
There's no harm in being a little cautious around people you don't know~! But if you can do something to make yourself feel better, maybe get in touch with him if you can. Give it a shot. But otherwise, don't beat yourself up about it! It might have been something you regret, or in the long run, been a good decision. You just never know!
Desperate, no. But if you aren't going to take some sort of action it's best to not dwell on it. Do you have a facebook and is it possible for him to have one as well?
I actually met my boyfriend at a rave a few years ago but I had to leave early because I worked in the morning, but I managed to find him on facebook with only his first name. I don't care if that's a little desperate, I'm in a great relationship because of it .
I called the hostel to try and find out his last name, but they wouldn't give it to me Oh well, after that I felt ok, I think i've moved on haha Plus I tried searching facebook with his first name, there are way too many Eduardo's from Rio.....
Haha.... I think you got to remember that you where there both on holidays. your not the first to go through this. Things are much different then, he might have just wanted a one night thing for all you know... other wise if your after a relationship, long distance is not a good way to start. But then again you got an image to up hold that no one else really cares about.. who really holds your image as an example... probably better not to worry about other people..
Well I guess its like with rock stars or so on... maybe lets use a porn star as an example.. they may be a complete idiots and only care about them selves and no one else. In the end people only respect them for it and for us ordinary people that care about what others think and don't want to offend anyone. You get no where..