Welcome Timothy,
Is your separation supervised by a pastor or Christian counselor? Is there a plan and time frame to it or is it just a time to process things on your own?
Without a plan, time frame, and impartial but concerned third party, the likelihood is that the concerns which led to separation in the first place will not be resolved, leading either to an unstable reuniting or a divorce.
If you are doing this on your own, I would suggest the following:
- Ask the Lord what He wants to heal and change in you. Deal honestly with everything He brings to your attention, and keep asking until you sense that He is done for the time being;
- Ask for feedback from friends, what they see in you that may contribute to the problems;
- Sign up for the daily devotional from DivorceCare.org - not because that is where your marriage will end up, but because there is a lot of relevant wisdom shared through that medium.
- Get accountable to another Christian man (or a small group of men), face to face, if you aren't already. Strangers on the internet can certainly pray for you, but you can give us a snow job or just stop responding at any time. People who know you personally can get in your face when you're hiding things.
May the Lord give you peace, healing, wisdom and guidance. You will need them all, and then some.