They weren't jealous. They were having fun and feeling silly about being all wet and cold and were just drawing you into the game and "suffering" the same "misery" as they were. It was just fun and games to them. They just wanted you to loosen up and join in fully. That's pretty normal horsing around amongst friends.

I notice that several of your posts pertain to staying very tightly bundled up in your clothing. It seems to be important to you, but it may come off as sort of closed off to your friends and they are perhaps trying to draw you out and get you to loosen up a bit.

If that really bothers you, perhaps you might really talk to your friends about why you are uncomfortable when you are not tightly dressed and ask them to respect that need in you. Perhaps if they have a better understanding, they will be less likely to do this kind of thing in the future.