fairnymph
Ex-Bluelighter
Your confusion over this seems to me like you want to cheat. If you actually love your wife and if she truely loves you then you must talk to her about this. I wonder if you think she won't understand, she'll leave you. True love is about communication. Also do you actually want to have sex with another man or not? I think you explore what fantasies you have with her first. Talk about this with her. Hell my wife loves that I have my own vibrator to use on myself. She doesn't think about it being sign to being gay, she knows that I enjoy the sensations I get from using it.
This. People have given you some really good advice, but you're still stalling. There is only ONE right course here - tell your wife. As you yourself said, these feelings/thoughts/fantasies aren't going away, but getting stronger. You haven't mentioned any recent interest in sex with women, which I find very telling. Your wife deserves to know why she's not getting the sex life she deserves. Yes, she may freak out, she may leave you. Or she may be okay with an open relationship of sorts. Either way you must tell her.
Honestly, I think from the very first time you started thinking about men sexually on a regular basis, you should have told her. The fact that you've been hiding something so big from her for so long is bad all around.
Edit: I have to agree with Tamarinds. My soulmate was a little bi but mostly asexual and I've always been very sexual. We just didn't have sex very often & certainly there have been other men I connected with better on sexual terms. But my late husband was still my soulmate.