What should I do when the man I love has a gf?

I found the love of my life. This is the first time I've liked someonefor their looks and for not how they look. He is my support system and the only person I can talk too. He's deepened my belief in Christ and I love him! But he has a gf and never talks to me when she's around. But I k ow he feels the same. What should I do?