Hey Gummi, welcome!

I do believe that you should tell your therapist. The feelings you are experiancing are quite normal in my opinion, we all experiance them at some time or another. Your therapist sounds like he has been a caring figure in your life, and i think that it is "normal" to react to that with feelings of affection. I'd say to go for it. Tell him how you feel. In my opinion, that can only further the theraputic relationship.

Good Luck, and let us know what happens!
Mel