Yes, they did have a romantic entanglement at times in the comics.
Yes, in some comic storylines, Wolverine was involved in the events that led to Jean Grey's death.
Yes, Wolverine has killed Jean in some comic storylines.
Yes, Wolverine has had complex and sometimes romantic feelings for Jean Grey in the comics.
Yes, Wolverine has died in some comic storylines.
Yes, Wolverine did die in some comic storylines.
Yes, Wolverine has a daughter named Ruby in the comics.
Yes, Wolverine and Deadpool have fought in comics on multiple occasions.
Yes, Wolverine has a daughter named Laura Kinney, also known as X-23, in the comics.
Yes, Wolverine did die in the comics. But comic storylines can sometimes be complex and subject to changes or reboots.
Wolverine's demise in the comics was a result of various circumstances. His body couldn't cope with the cumulative damage and a specific threat that overwhelmed his defenses. It was a tragic end for the iconic character.