Mr. Right May Br Mr. Wrong

I have meet someone on a dating site, been chatting for some time now, but it a long distance realationship, and well I see it going no were. I have a friend that getting a divorce from her husband. Even though we are all friends, I think he is Mr. Right for me, we have so much in common and im so happy around him, but is it wrong to do this? I ask myself and his wife told me, go for it he a good man but after all these years well we grew apart. But I don't think he would take it serious. I feel like im not good enough for him, he notice me as a friend not a partner. How do I get him to notice me? Im looking for Mr. Right not Mr. Wrong anymore.