If you value honesty it's always good to tell your mate what bothers you. Should it have anything to do with them they're the only ones who can address it. Complaining to friends, family, or co-workers about issues in your relationship or marriage won't "solve anything".
Ultimately there are only two ways to experience joy and peace of mind in relationships: We either get what we want or we learn to be happy with what we have. Accept them (as is) or move on.
If not getting what you want is a "deal breaker" get out.
If it's not a "deal breaker" learn to live without.
The choice is up to us!
The first step in creating distance from your mate is to lie about how you feel the relationship is going or how you feel about them. In order to fix a problem you must be willing to openly acknowledge it.
More often than not when we keep it to ourselves it's because we're trying to decide whether or not we want to stay or not.
There are instances where some people simply dread confrontation.
Sometimes people keep things to themselves because they're afraid their mate might end the relationship if he or she knew how they really felt.
In other instances we don't want to confront the fact that maybe we're just being "petty" or we're projecting (outside issues) onto our relationship.
It's not uncommon for people to take it out on their mate when feeling moody or angry about something that really has little to do with them. Determine what it is that's (really) upsetting you.
Anger is the Mask that Hurt wears...
Pulling away has never made for having a lasting happy relationship. Emotional distance leads to breakups or cheating.