Michael, I really don't know what to say about this apart from I could have written it (just not as good lol) because as you know I seem to be in the same sort of situation.
Bloody 'love' and all the things it brings to the tables. I often say I'd rather be a little girl again because skinned knees are better than broken hearts. I may have got this all wrong mind.
Love the last couplet.
Em

Michael - a wonderful sonnet, wistful and epic and beautifully written. I have a couple of suggestions, though.

Why does the rain cascade from purple sky?
The intensity is soaking through my soul.

^^

First line is perfect and flows wonderfully, however, I think the second is one syllable too many. I would try removing the first 'the' as I'm not sure the iambic meter is right with it there anyway. 'The' (stressed) 'in' (unstressed) 'tense' (stressed) 'si' (unstressed) 'ty' (stressed).

What about 'intensely does it soak right through my soul' or something like that.

Wanting your hand to reach out without care.

^^

'Want' (stressed) 'ing' - (unstressed) so I think this throws the iambic a bit too.

Lasting friendship is something never bought.

^^

Same here at the start: "last" is stressed and 'ing' is unstressed. It could be 'A lasting friend is something never bought'

All up to you Michael and either way, the grandeur of this piece and class is obvious.

SL

Michael, this is just lovely-you English blokes and your mastery of sonnets-just kills me...beautifully done-