Never be afraid to tell someone you love them. the only thing you'll regret is not telling them. And not always everything has to make sense, but if you give them no reason to believe in you, it makes no sense for them to stay.
I'm still a "forgiver", I'm just not codependent anymore. I've taken the time and energy to understand that there is a difference between forgiving, versus living in denial of the fact that some people are just broken or toxic.