The best thing I've learned from a breakup is that you have to take care of yourself. First you have to let yourself cry whenever you need to, I've had nights in the months after my breakup where I would just shut down and cry before going out somewhere or going to work and letting those feelings run their course made a huge difference. Secondly, focus on taking care of yourself and in your case taking care of your son as well. Having that purpose will help keep your mind off of the breakup. And lastly, always try to seek the positive where ever you can. This is the hardest part but after a month or two it'll become a habit and having a positive mindset makes such a huge difference. I'm so sorry that you're going through this but just know that things will get better and you will be ok. You're stronger than you think.