I'm going to cuddle with someone else while on break with my boyfriend
Why do you want to cuddle with someone else?
Because I want to see how it feels.
You can cuddle with other people; when not in a relationship. Since you are in one maybe you shouldn't do this?
So what if he finds out, I can always give him an excuse. Plus, him and I are just friends now.
I guess if you are honest with him, then it's okay. If you're not together anymore like you are claiming then you might be able to. Although your ex could still get mad.