He loved Lily Evans (Harry's mother), but she only considered him a close friend. She was his only real friend; they had become friends as children. Snape's love for Lily - in spite of her marriage to James Potter, whom Snape despised - was his motivation to become a double agent for Dumbledore when he learned that Lily was marked for death by Voldemort.
Yes, with Lily Evans.
No.
It is 'Snape', and no, he is not.
No, Snape was in love with Harry's mother, Lily, until his death.
No, Severus Snape died and never married.
Snape's patronas takes after Lily Potter's because Snape was in love with her.
Snape was in love with Lily.
Severus Snape never has the Elder wand, nor was he ever its master.
No. Lord Voldemort killed Severus Snape's true love.
Yes. He is killed by Voldemort.
In the official books, Snape is not in love with Hermione at any moment. Sounds like fan-fiction.
Harry finds respect in Snape at the end of the Potter series as Snape was actually helping and protecting Harry all along all for the respect of Lily's memory who Snape was in love with.