Positive: I would love to go swimming with a friend tomorrow, we will have much fun.
Negative: But i'm afraid because she has a lot to tell, like about her exam, her job, her hobbies, and she has many things in life that i dont have, and i'm afraid that she might think i'm boring because I don't have much to tell.
Another Positive thought: She's my friend, so she won't bring me down.
Another negative one: But I'm still afraid of what will happen.