Leaving good husband

If you where super unhappy but your husband was amazing would you try to work things out for your kids? My husbands great we don't fight he takes care of me and the kids but I'm just so unhappy with him. I don't love him anymore... He has no idea I've been grinning and baring it for a year thinking maybe it was just a phase but it's not getting better: I feel like I'm awful to break up my family just because I'm not Happy. What would you lady's do? I'm Crying my eyes out right now I think im having a break down