I was terribly looking forward to leaving for Vancouver last Summer to see my friends and enjoy perfect summer days which is having beer, chilling at the beach, and getting tanned but unfortunately all the borders were closed all over the world and I couldn't go on a vacation.

Please correct me naturally!

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‎I was terribly looking forward to going to Vancouver this summer to see my friends and enjoy perfect summer days full of drinking beer, chilling at the beach, and getting tanned, but unfortunately, borders closed all over the world and I couldn't go.

^ I think you’re talking about summer 2020. It can be confusing even for us, but we say “this summer” to talk about the summer of the current year. Sometimes we even say “this past summer” or “this last summer” to talk about the most recent summer season if it’s been at least a few months.