Why Snape did not take Harry to LV /Snape and Dark Arts

[clarinut76]

No: HPFGUIDX 138252

I don't think Snape is in this for himself.  I think he adores the Dark 
Arts because of their great power and mystery.  I think that he wields 
them because he wants to show his mom (or his dad?) how powerful he can 
be.  In rereading HPB, it does talk about how in the potions book, the 
HBP becomes increasingly interested in dark spells...muffliato is 
harmless, sectumsempra causes a huge amount of damage.

When did Snape use this book?  What events caused him to more closely 
examine the DA?  Was Slughorn still at school when Snape was in his 
house?  I guess we can assume so, since Slughorn talks about wanting 
Sirius and Regulus in his house.

Anyway, I can't imagine Snape wanting to be a new Dark Lord.  We still 
haven't fully explored the relationship between Lily and 
Snape...the "awful boy" that Petunia talks about is never clarifed as 
James and Lily.  I'm wondering if somehow, this is the regret that DD 
tells Harry Snape felt.

Rachel