Most Helpful Guy
It's ok cause there's nothing exclusive between any of you, but you should tell the first guy that you don't like him, cause he asked you on a date, and you accepted, so he thinks you like him... you actually should have said no to thee first guy, or just tell him that you just want to be friends.
Most Helpful Girl
It's okay to go out with both of them since nothing is exclusive, however, keep these things in mind-- and take my advice seriously:
You don't want to hurt anyone (because that's not nice), so don't lead either of them on if you aren't looking to be in a relationship with one of them in the future. Meaning if you don't like the first guy, tell him somehow that it's not going to be a date. And in my personal opinion, dating multiple people is OK-- until you're "official"/exclusive with someone. Cheating is bad (lol).
But let's get this down: dating doesn't not mean you're their girlfriend or he's your boyfriend. Dating is when you go out on dates prior to being in a relationship (or not) to get to know the other person (basically to see if you like each other or not).