I want to write my friend's story (but not tell anyone it is true) and I am wondering something. He told me that they were friends for three years. Do I speed things up in the story or how do I tell that to the readers?

I would really like to do my friend's love story justice. If this is in the wrong category, let me know and I will move it. Thanks in advance...
I would really like to do my friend's love story justice. If this is in the wrong category, let me know and I will move it. Thanks in advance...