How does one forgive and forget

You have no right to be mad at him for this. You knew the risks of unprotected sex just as much as he did.

Being angry at a dead person is incredibly selfish. They are gone and there is nothing you can do about it. Try to remember the good things instead of bad. I hate when somebody complains that somebody died and they are mad for reasons like they owed money or other petty bullshit.

Reminders of people who have passed are a good thing. We should not forget those who have died and remember them with respect they deserve. Sometimes memories are sad but we have to deal with them anyways. I hope people don't want to forget me when I die.