If you didn't tell them what you planned to do, that may be the problem. If you had to ask permission, that isn't healthy in a relationship. Asking them how they feel about you going and making your decision to go, counting their opinion, is wise but understand that you should be able to go do things with your friends and you shouldn't have to ask permission.
I think this is a big point, especially if your partner has been cheated on in the past. There's a big difference between actively hiding a thing and not telling someone just because it didn't seem relevant or necessary, but manipulators blur that line and it can mean that people who have experienced being cheated on may be hyper vigilant in future relationships.