Marriage is something that needs to be worked on every day. I don't know if I'm the one to give marital advice since I've only been married for a little over a year but marriage is certainly easier if you are open trusting and loving.
No matter what you're going through there's a light at the end of the tunnel and it may seem hard to get to it but you can do it and just keep working towards it and you'll find the positive side of things.