Trahison

I'm not proud about who I am and what I've done ... Actually I'm even ashamed. I feel like a betrayer because I didn't realize how good some people were with me. And I also didn't deserve that goodness.
Today I would like to say to these people thank you, I would like to tell them how much they were fantastic, how much I've loved them or how much I love them for that. The problem is, I can't, because if I do, I'll be more betrayer. If I do, I'll betray the feelings of other people. So what can I do?! I wish I know ...