I think our marriage might be over..

We have been together for over 7 years, and married for 2. We have a 1 year old and I just don’t know what to do anymore. We argue over everything. We talk down to each other, belittle each other, and just down right don’t know how to talk respectfully to each other. We do our best not to in front of our son, but it doesn’t always work out that way. I would love to do counseling but I just don’t think we can afford it. I’m starting to feel defeated. Does anyone have any advice or things that have worked, without counseling? I can’t keep living a life with a partner who I have no desire to be around. I want to fix it. I just don’t know how.