I regret that you made me sad all the time. I regret that I trust you too much. I regret that I trust you too much. I should know you, this longer before making a decision.
I regret that you made me sad all the time. I regret that I can trust you, too. I regret that I trust you, too. I should let you know more than this before.
I"m sorry you made me sad all the time. I"m sorry I trust you, too. I"m sorry I can trust you, too. I should have known you for a longer time before making a decision.