Most Helpful Guy
Sounds to me like you both need a bit of space to work out what you really want from this relationship. I understand that you have both been together a very long time and have a child together, but that is not a good reason to stay together if things are not working out... It will only become more destructive. Sounds to me like you both need to rekindle that spark that initially brought you together and that I assume you both had in the early part of the relationship. Have a break and see how much you miss each other or how much you both enjoy some time to yourselves, or maybe try to take a short holiday away together.
Either way I feel that the worst thing that you can both do is nothing so that you both end up miserable for a prolonged period of time, which is the last thing you want with a child. I hope you are both able to come up with a solution to this situation... :o)