Boozer was moved by his willingness to sacrifice himself for him and so he continued to live with his grief buried. Some years later, a disgraced MC member Jessie Williamson killed another member over drugs. The MC's code stipulated that he must be stripped of his colours.

How do you keep Boozer alive?

To put things plainly, no, Boozer does not die in Days Gone despite the game teasing his death multiple times in the story. At the start of the game, Boozer's arm gets injured, and it's obvious that Deacon won't be able to nurse him back to health on his own.

How does Boozer die?

Moving to Iron Mike's Camp

As time goes on, Boozer's situation becomes dire, and it is discovered that he has contracted blood poisoning from his injury. Deacon, desperate to save his friend, decides to take him to the Lost Lake encampment.