Not extending unconditional support to a wife (with a generally good hubby) but pining like a teenager, for an extended period, not a short event, - is now called as "immature" and judgemental ? Who is immature in the scenario described above? What next - unconditional support to what else is expected so that we are labeled as mature?
I do not know what to call OP's situation - be it infatuation, attraction, or is it really just a crush? or more like OP wants to have a fling? Whatever it is, it is not probably worth risking what OP have now (based on what is described as a great marriage). OP, dig deeper into your mind and ask yourself, isn't it time to let this go and live a better free life? Mourn if you have to but IMO, teach your mind let it go.
Didn't mean to be rude. Please come out of this soon. Dont ever tell your husband or family members or friends about this crush.