What happens if I don't want to sell my shares? I don't understand how that works.
If you don’t want to sell your shares, prepare to convince a majority of the shareholders otherwise.
This will be very hard since 45% of the company is owned by the people making the buyout offer.
The TL;DR of it is that your shares will be sold for you, and money will be deposited into your account. As a "common" shareholder, you don't get a choice in the matter (I mean, you can "vote", but common share votes aren't worth the email they're printed on).
Index funds for the win, I guess.