Most Helpful Guy
Just lol at thinking you can be "friends" with your EX. You can't be JUST friends with a guy who you at one point use to let cum on your face.
You guys are going to fuck on this holiday trip then might get back together or enter friends with benefits relationship.
Most Helpful Girl
I tried something similar and it did not work out. Even if both people genuinely want to be friends it can become very complicated. However, you'll never know unless you try. Do what feels right to you.