1. If you tell someone else they might form a dislike for your spouse, which could ultimately pull apart your marriage; is it worth it?
2. The person you talk to WILL react differently than your spouse would, and who knows, you might like their response more than you like your spouses, so that can harm your marriage also.
So think about it, are you willing to sacrifice your marriage?
Remember, you can pray to your Heavenly Father who understands EVERYTHING, but most importantly, talk to your spouse. They might surprise you.