Can forgiveness be a bad thing?

I'm the type of person who completly believs in forgivness. I can't stay mad at people, well to a certian extent. The people though who mean a lot to me like my family, my boyfriend, and some of my close friends; no matter what they do I can't seem to stay mad. They could be so mean to me and I'd still always say it's ok. I know forgivness is a good thing but sometimes I feel like it can be bad.. what do you think?