In this sentence, "dynamic" means the way you interact with each other.
For example how two people behave and respond to each other.
2019年8月24日
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Thanks a lot!
2019年12月3日
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Dynamic is related to the word "dynamo" and means 'power'/powerful. "I really love our dynamic' means that the person likes the power of you 2 working together, that together, you have more power, more creativity, more effectiveness.