Yesterday I had dinner with my colleague Isabel after work. We had planned to try some Chengdu food, but so many people were lined up in front of the restaurant that we just gave up. Instead, we had a barbecue and ate some ice cream afterwards. Although I was pretty tired coming home last night, I had a really good time. This was the first time I have hung out with a colleague after work. Since colleagues usually only see one another at work, I consider myself lucky that one of mine has now become a friend. No mistakes. Good sentence structure. Of the three choices: 1 - I really had a good time 2 - I had a really good time 3 - I really did have a good time the one that shows the least enthusiasm is #1. One possible thing you might work on is discovering more interesting verbs. This is not a mistake to correct. Rather, it is an opportunity to improve the breadth of your vocabulary. Your only verbs other than "have", "be", and "get" (the least interesting verbs in the language) are "plan", "try", "eat", "keep", "consider". That's not bad, but there's room for improvement. You could "dine" instead of "have dinner". Instead of having a barbecue, why not "enjoy" one? Instead of being tired, why not "nearly collapse". It sounds so much more interesting if you introduce some drama. Instead of keeping contact, why not "mingle": "people usually mingle with their colleagues only at work".

Yesterday I had dinner with my colleague Isabel after work. We planned to try some Chengdu food, but there were so many people lining up in front of the restaurant that we had to give up and decided to have a barbecue instead then we ate some ice cream after dinner. Although I was pretty tired when I got home last night, I really had a good time. This was the first time I hung out with my colleague after work. Usually, people only talk with their colleagues at the office/their workplace and their relationship is strictly professional but I consider myself lucky to be able to become friends with my colleagues.

Yesterday I had dinner with my colleague Isabel after work. We planned to try some Chengdu food, but there were so many people lining up in front of the restaurant that we had to give up. We had a barbecue instead, and we ate some ice cream after dinner. Although I was pretty tired when I got home last night, I really had a good time. This is the first time I have hung out with my colleague after work. People usually keep contact with their colleagues only at work. I consider myself lucky to become friends with my colleagues.