Nicole is right - you can't just be friends while you have feelings for him. You will only get hurt.
From this angle, I'm seeing a very selfish man. Someone who spends all this time with a woman who he has no intention of committing to and now someone who wants a friendship with a girl who loves him. He's all about himself and his own needs isn't he.
Anyway, if there's one thing you learn from this, it would be to dump a guy who openly confesses to commitment issues like a hot potato. Don't waste a moment of your time thinking that he will change.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.