He told me he is not in love with me

We have been together for 3 years and have a 3 months old baby boy. I'm struggling with postpartum anxiety and OCD since a couple of months ago and I feel really lost because I'vealways been super strong and I didn't know I could have this problems. My husband is the kind of man with a great heart but incapable of doing anything without being told first, and I really needed his help this time, help that I didn't get. He says he tries but the only thing he does is being in the house, he thinks that's being supportive. My behaviour is being bad too, I feel really alone and have panic attacks for the first time in my life and that affected how I treat my husband too. Yesterday we had one fight and he ended up saying that he is not in love anymore. This left me devastated. I thought couples fight for their relationship when most needed, that going through difficult times make the family stronger. And he told me this.
I am so sad and I don't really know what to do. Shall I take my son and leave or stay and try to fix it?