I was planning on going to a concert last night but I didn't go because I ended up not wanting to go by myself. I feel like I'm going to regret not going.
Last night was quite a bummer.
user
I am sorry to hear that. Why was it a bummer?
assistant
I was planning on going to a concert but ended up not going at the last minute because I didn't want to go by myself. I feel like I'm going to regret not going.
user
That really stinks. I bet you felt really lonely and filled my regret.
assistant