Lunch Date

I was off from work yesterday and had my first eHarmony lunch date. Now let me start by saying that this guy writes on his profile that he looks younger than his stated age (47). When he and I first met, I knew immediately that there was no physical attraction. And he does look his age. There was no chemistry whatsoever but I figured he only had an hour for lunch and and I can certainly manage to get through that. We spent time talking about healthy eating which I know very little about. It felt awkward for me because I tried very hard not to show the boredom I was experiencing. The conversation just seemed to get more and more boring until we started talking about music, which I love. Even so, I knew deep in my heart that this nice guy sitting across from me was not going to see me again. After an hour went by, I said "Gosh, look at that, it's been an hour and 15 minutes, you should be getting back to your office". He said, "oh, it's okay we can take our time". Yeah, I realized that I would have to somehow bring this thing to an end on my own. So 45 more minutes passed and I said, "I really think we should leave now" and as I started to get up, he followed my lead. It's easy to end a fun date. But how do you end it when you know you don't want to have contact with the person ever again? As we began walking, he said he had a nice time and wanted to get together again. I didn't want to hurt his feelings and simply said, "yeah". We had an awkward embrace and we parted ways. I came home to a nicely written email from him thanking me for meeting him for lunch. Now what do I do? What do I write back? Should I write back? Help! I decided to just say thank you back and that I, too, had a nice time. I kind of knew there was no chemistry with him over the phone when we were planning to meet, but I wanted to keep an open mind. In hindsight, I should have just trusted my instincts. Now tonight I will be going out with my Pakistani. He, unlike my lunch date, was very funny on the phone, and I am looking forward to meeting him this evening. It's not a time limited lunch date so I hope like hell we get along pretty well.