YES, can. Restrictions between girls and boys in the relationship of friendship-no! They can even become good or best friends with each other.Simply already worked out such opinion, that have boys friends boys, and have girls – girls. But in fact, friendship cannot be limited by these limits. If the boy understands you, you can talk to him freely on any topic and not feel awkward. I think friends we must choose not to look ,and especially what they are ,man or woman-the main thing that it was true and loyal friends who will come to the rescue!