Hanging out with you today was the best time I've had the last few weeks. Thanks!
Spending time with you today was the most fun I've had over the last several weeks. Thanks!
ーHanging out with you today was the best time I've had the last few weeks. Thanks!
「今日あなたと遊んだのはここ数週間で一番楽しい時だった。ありがとう！」
to hang out with ... で「…と遊ぶ」
... was the best time I've had the last few weeks で「ここ数週間で一番楽しい時だった」
ーSpending time with you today was the most fun I've had over the last several weeks. Thanks!
「今日あなたと過ごした時間は、ここ数週間で一番楽しかった。ありがとう！」
to spend time with ... で「…と時間を過ごす」
... was the most fun I've had over the last several weeks で「ここ数週間で一番楽しかった」
ご参考まで！
I had the greatest time in the last several weeks. Thanks.
おっしゃられている内容は以下のようにも表現できると思いました(*^_^*)
I had the greatest time in the last several weeks. Thanks.
「ここ何週間かで一番素晴らしい時間でした。ありがとう」
the last several weeks「ここ最近の何週間か」
以上です。
少しでも参考になれば幸いです(*^_^*)
★★大阪カフェレッスン英会話講師KOGACHI
カナダ 
日本 
