他说我们只是玩玩
[tā shuō wŏ men zhĭ shì wán wán]
By saying 'he said we're just fooling around,' the owner of this online name wants to share the fact that their relationship is not serious but light-hearted. It might suggest a non-committed type of relation, sometimes hinting some sadness or sarcasm in response to that statement from another person.