The feelings and attractions we have towards others was given to us for a reason. It is the sign of a truly loving individual. To hide or deny your true sexual compassion is harming both you and your wife. I know my husband shares some of your desires. I see absolutely nothing wrong with having a desire for the same sex.
Sexuality is a wonderful experience, so enjoy it.
I am a happily married bi female that has experienced the same feelings you are. I share them openly with my husband. The love you express for you wife is probably the same love she feels for you. Talk to her openly and honestly. The feelings and attractions we have towards others was given to us for a reason.