I've lost the spark

This is my first time posting anything like this, so I am a little nervous. I have been in a relationship since I was 15. At 24 we got married and at 27 we had our son. We are now 29. My husband is my best friend in the whole world and I couldn't imagine my life without him. The biggest issue in our relationship is that I have lost physical attraction towards him. To be perfectly honest with myself, it has been missing since the first 3 or 4 years. The thought of sex fills me with anxiety but for no particular reason. We used to have a keen sex life, but this may be due to the fact we were teenagers. I know my husband still desires me, as he tells me often, but I could quite happily go the rest of my life without doing it. It isn't a 100% loss of libido though, because I have found myself attracted to other men. So I don't know if this is something I should just ignore? If we were to separate, I know it would completely tear him apart. And I don't want to have to break up the family life that my son has. I'm definitely not unhappy, but there is a small part of me that is always thinking what else is out there. Has anyone been through something similar? How did you deal with it?

went through the same thing. i lost all desire and ignored my husband. he then found someone on line to have an online affair. after i caught him, he said it meant nothing, it wasn't real, he was only thinking of me...3 yrs later and now we are facing divorce because, even though i "forgave" him, i can't forget and it consumes me. if you really love your husband, go to the dr and get help. it may be as simple as hormones and you can save your marriage-if you really want to. good luck