I had to laugh at the sentence "sometimes I think I'm as nuts as he is." I feel that way too. Why in the heck am I immersing myself in his ridiculousness? (Is that a word? It should be!) Anyway, I have a life. This kid is almost 22 - how many more years must I subject myself to this garbage?
It doesn't mean that I don't love him. It doesn't mean that I won't help him. It doesn't mean that I won't worry.
It just means that the umbilical cord must be cut.