If you think that she just did it to make them jealous, don't go. If you think that there's a chance of it being genuine, then give her a chance too. Just don't keep your hopes high until you're sure of her intentions.
You should go for it! You don't have to post about it or make it public or anything like that but you also shouldn't mention it to the two boys or mention the boys to her. I understand your conflict, but I think you should give it a try, and if she is using you, that's a dick move.
Did she ask you out as a friend or for a date? Maybe she only kissed one of these guys because she's unsure of her sexuality right now... I would hope that she wouldn't ask you out without genuine intentions! If you're interested in this girl then by all means go on this date, but just have a 'see how it goes' attitude towards it. You can ask her the question of her intentions and hope that she gives you an honest answer, but I think your decision should be based on if you want to go out with this girl and just be cautious in doing so! Hope that helps! 😊