What kind of man will leave his pregnant gf and 2year old son to go with another girl he barely knows shuts his phone…

What kind of man will leave his pregnant gf and 2year old son to go with another girl he barely knows shuts his phone off and disappears? Takes all the money knows there's no groceries in the house completely falls off the face of the earth over an argument he starts? Calls the cops to escort him out of our home and as soon as he's out the door with the girl he shuts his phone and and I never hear from him again. Saddest thing about this is that it's not the first time he disappeared and didn't come home. My poor son is up at 5am crying for his "dad" yet he could careless cause he doesn't see the hurt he brought upon his own child instead he only cares about himself! And we are having another baby.. idk what's wrong w these men, I'd rather be left to be a single mom from this point on then deal with someone who thinks he can come and go as he pleases! Idk what to do anymore