Why does it matter if someone you don’t know doesn’t want a second date?

Hi, I think this has probably happened to everyone at some point. Recently I thought I’d get back into the whole online dating thing. I found a date fairly quickly and went out, she didn’t speak English very well but she was chatty, I just had to say things in the most basic understandable English. After a rough first 30mins we started getting along well, we stayed out another 3 hours. After the date we were messaged saying we should do something again soon. I hadn’t really decided how I felt about her. Anyway I thought it had gone well, so next day we chatted a bit and then I asked her out at the weekend. She replied saying she didn’t feel a spark and she didn’t want to see me again. At first I thought I didn’t care, it was only one date anyway. But then I started feeling crap. And I don’t really know why, is it just rejection or what? You start to get your hopes up a little and then blamo, you don’t get a second date. I know from friends and past experience, there can be soo many reason why a woman doesn’t want to see a guy again, probably other guys messaging her, and so many reasons that aren’t even anything to do with the guy. You know what I mean though? You weren’t 100% sure about the person anyway, then they don’t want to see you again, you think it shouldn’t matter, but the way you feel is a little rejected? and like you didn’t really have a choice and they never really took the time to know you, so it makes no sense, but it still makes you feel crap somehow? Why does being rejected by someone you didn’t really know make you want to change something you can’t? Is it just the mind trying to understand it so it doesn’t happen again?

Also I don’t know if this is something to do with it, when you have for example three dates, and they don’t want to see you, it’s usually fine, because by that time you’ve seen the good and the bad and you know what would have been bad, it’s when you don’t know them that makes it a little worse, because your mind makes them seem better than they probably are? You feel like you’re missing out more after one date instead of three? Lol is that just me. Three dates feels like you gave it a try, one date makes it like you didn’t even have a chance to find out anyway?

I guess I thought it might have had potential. But yeah probably just my ego getting bruised.