Why is my family and former inlaws trying to take my 7month old son from me?

i lost my wife 7months ago while she was giving birth to our son and its beem hard and i have been doing the best i can working and taking care of my son and everything at first i was super distant from my son and hated him cause i blamed him for losing my life but now i loves him more then anything and wouldn't trade him for anything. Well my mom and sisters and mil and fil came over today and said they wanna take my son so i can get a break and because they want me to mourn and go to a therapist but i don't want to i loves my son more then anything what should i do? why are they being like this? Advice?