Nta.... although creation is a unique thing in itself and I wis you would consider one meeting. For me personally not meeting your creator is always going to feel like unfinished business. Again I understand how its painful for you and you've desensitized yourself from it and you are under no obligation to have a relationship. But I would actually think about how it is for him, and how although it was an awful experience when you were 18, how it's a little bit better now that you're grown and have better perspective. Now this isn't me saying you better do it or you'll feel the guilt. But looking at it through a different perspective and weighing all the ways this meeting would go definitely would not hurt. Most of the time people are looking for closure.