Most Helpful Girl
Be upset, but don't jump to conclusions. It's best to just have a night to yourself, have a babysitter or a family member watch your kid for a few hours so you can just talk about where you both are in the relationship. If you are in different places and there is just no romantic feelings left then maybe it's time to think about going your own ways.
If I'm being honest, I would say that it sounds like you're just dragging out a break up for the sake of a child, which can end really badly, usually with a lot of anger and, speaking from experience (having been the child in a case like that), a lot of unnecessary pain for your child.
If you are both unhappy, which it sounds like you are, it may be best to just go your separate ways and just be good friends for your child. From a child's perspective, it's better to see your parents being friendly, but not romantic, rather than have them fighting and yell because they are too frustrated or fed up with each other to even be in the same room.