Is 跟他交朋友 ambiguous: can it mean both "become friends with him" and "with him, make [other] friends"? We have the phrase


  跟他交朋友
  Make friends with him


However, I'm wondering if it's ambiguous:


You go from a state of non-friendship with him, to a state of friendship.


  A: 你想成为我的朋友吗？
  B: 好的！

You both go out looking for friends.


  A: 你想出去交新朋友吗？
  B: 好的！



Perhaps there's some subtlety here I'm missing, but it seems like it's ambiguous.

Question: Can 跟他交朋友 mean both "become friends with him" and "with him, make [other] friends"?
To add a simple perspective to the other elaborated answer given, just think about the connotation to the English expression: "I made friends with him". 

In 99.9% of the time, you would know that the meaning is only two people, you and another person, who become friends. If otherwise, the context would indicate this. The same logic applies in Chinese, in this case as well as in many other semantically ambiguous situations.