Okay I will try , White Dove I have three sons and I would be devastated if any one of them treated me this way .
However in your case it makes no sense to us readers that your son just out of the blue has chosen to be so hateful . There must be some personal issues you two have gone through to cause such actions on his part . I am sorry ...
My advice would be to back off give this situation space and time . Do not make a bad case worse . He is 19 .....is he really financially able to marry and provide for a wife ? If not maybe he knows you will oppose his decision so in his immature way is cutting off communication to get his own way ??
Only you know the whole story .
I am sorry this is happening and causing you pain . Be the adult ....even though you are hurt ....remain calm cool and collect and let him reap the consequences of his actions .
I hope he will mature come to his senses and be happy he had a loving mom that didn't stoop to his level.