Jenny, I often think if I am as important to you as you are to me. We had an unhappy time yesterday. I really felt sad after it and almost apologized   to you. However,you could still laugh and talk with others like nothing had happened. I suddenly realized that I was not that important to you. You didn't even realize that I was angry and sad. What's more,you even forgot my birthday this year. Goodbye,my friend. I have closed my feeling toward you. It is sad to say goodbye,my friend. But it is meaningless for us to be friends any longer. Lucy Dear Lucy, I'm sorry that I hurt you so much yesterday. But here is something I really need to tell you. I never thought the quarrel we had yesterday was as serious as you thought. I just felt tired and didn't feel like going shopping. Susan and Lily are also my good friends. I couldn't pretend   not seeing them when they passed by. I also couldn't let them know I was blue because of the quarrel. I didn't want them to feel sad just because I was sad. I'm your best friend,but I don't want to be your only friend. I don't want to be with you all the time because sometimes I need to have my own time. I want to spend some time with my other friends and my brother. Please try to make more friends. You will feel much happier if you have more friends. And remember,I'm your best friend forever! Jenny According to the passage,if we say someone is blue,we mean he/she is   _   .
angry sad kind happy