I think it's in episode 79 during the Edolas arc
Lisanna doesn't die. She was unconscious when she was sucked up into Edolas, there for everyone thought she was dead. In the anime and manga, Natsu doesn't like Lucy that way, but he like Lisanna that way. :) I'm a fan of Lisanna and Natsu, I think Lucy should go with Loki since loki likes her.
In the 26 episode, but very few times
It never actually shows him make the grave but in episode 79 they explain why he made it. Its also the last time they ever mention her grave in the series.
It hasn't been revealed in any of the episodes yet, the TV anime has not caught up with that part in the manga.
Episode 29: My resolve. He cried over her at the end of the episode...or so it was stated by Happy.
He first appears in episode 64 but his fight with Natsu doesn't really start till episode 65 then it's finished in episode 67.
27 is part of it so maybe 26,27,28. try those.
Some of the best NaLu episodes in Fairy Tail are Episode 122 - "The Right to Love," Episode 175 - "Natsu and Lucy," and Episode 328 - "Natsu's Mind." These episodes highlight the strong bond and development of the relationship between Natsu and Lucy throughout the series.
episode 19
no soon they maybe kiss
episodes 46 47 48
yes they do dance i just don't remember which episode
Natsu and Lucy dance in episode 50 of Fairy Tail, during the Fantasia Parade event. The scene showcases a brief moment of lightheartedness and camaraderie between the two characters.
There are two episodes wherein Lucy hugs Natsu to stop him. The first one was during the lullaby arc,episode 7, and the second one was during the Edolas arc,episode 82. :)
Zeref doesn't appear in 'Break Out', the intro for episode 221. At a guess the character is actually Rogue Cheney who appears with Sting and Team Natsu near the end of the intro sequence.
Episode 57