Ideas
I just experienced this same issue. My sim had the indoorsy, close knit, and single and lovin it lifestyles. He was at college and finished his class. I had him do homework outside briefly and then made him return home because he was tense from being outside. The moodlet, however, would not go away. He couldn't do any of his homework because of it and I ended up buying a potion to make it go away. I had the same issue with the close knit one where it said that he had too many friends and was tense because of it, but when I checked he only had 3 people under the friends tab. I used a potion for that one as well as these moodlets don't have a timer on them so it's impossible to get them to go away without buying one and it's impossible for them to do almost anything while they are tense.