I went on a date with a lovely guy last weekend and I really liked him. We got on, and it seemed to go well but he has said that he doesn't think we should meet up again because there wasn't a 'spark' and he doesn't want to lead me on. I think this is a little unfair because you can't tell much from one date, but whatever. Anyway, I'm feeling pretty gutted about it especially as I thought it went well and I really liked him. It has triggered a spiral of negative thoughts about myself. How can I deal with this?