I Have Done Things I Am Not Proud of

[youtube=https://www.youtube.com/watch?v=RnBT9uUYb1w?list=PLx0sYbCqOb8TBPRdmBHs5Iftvv9TPboYG]

Do you think it's healthy to share everything with your partner?
Even things you know will definitely ruin his/your day..?

I wanna be able to.
But he still can't accept some mistakes, relationships, i've had in the past.