First off thank him/her for a nice date, and explain (gently) that you don’t feel that there is any chemistry. You may prefer to do this by phone at a later stage. If he/she asks for a second chance, and asks you to go on another date with him/her; you must be firm with him/her. If you don’t want to have any kind of relationship with the guy/gal, then you have to make it quite clear.
Just close it off as quickly as you can. If you are going to the dinner and then the movies, tell them it is just not working out after dinner and thank them. There is nothing wrong with leaving if your date just plainly sucks.
First off, who wants to deal with you and your negativity on their date. They want to get to know you better and a sure way to not catch a great person is by approaching them with a very negative sense. If you just start swearing around them or you have talked about them behind their back in the past, are you really doing what you should? Just avoid the issues and try to make the first few dates the most positive experiences of your life.
This has been a Ryan’s Dating Connection mini tip, for those who are too lazy to read Dating Tips