Need help losing extra tummy

So I was always petite before I had my son, even had trouble gaining weight. I weighed 116 before I got pregnant with my son and by the end of my pregnancy I weighed a whopping 175. 5 months postpartum and I still weigh 170. Most of it seems to be extra skin, but I just don’t know how to lose it. Please give me tips. I tend to look in the mirror and just cry and cry. The father of my son called me fat and we’ve since split up. I can’t bring myself to even think of talking to another man because I always think to myself who could love me like this... I just could really use some tips ladies. Before and after photos