My boyfriend danced (grinded) on another girl whilst we were on a break. We knew we’d end up back together- im unsure what to do about it because i feel insecure/ disappointed?

Even though you guys were on a break i believe that it was wrong for him to do that to you. That action shows that he doesn’t respect you and you deserve someone who will respect you even when you guys are on a break. My advice for you would be to realise that you are strong and beautiful. You don’t need anyone or anything to be complete. If this boy disrespected you, make him understand that you won’t tolerate that kind of behaviour ever. Being disappointed is normal because you weren’t expecting him to do something like that to you. Never forget that the actions of someone is affected by themselves not you. So it wasn’t because you weren’t enough or beautiful or smart or anything, you are all of those things and you are enough. The right person will see that. This boy is not ready to see that and that is his loss. Its okay to be sad but never forget that you are important and loved. Just because this boy treated you bad doesn’t mean everyone else will too. Respect yourself and love yourself.