Answer:
I am talking to a friend.
Step-by-step explanation:
The present participle makes all six of the progressive forms, which include,:
I am talking;
I was talking;
I will be talking;
I have been talking;
I had been talking;
Will have been talking.
So, in the end, if you add "to a friend" to the end of any of these sentences, you will have a sentence that correctly uses present participle.