I'm not generalising.. it's just that I feel like once a girl really likes a guy, it's hard for her to think about anyone else while she's into that guy (at least that's the case with me) but for guys is it the same?
Suppose you really liked a girl and wanted her to be your girlfriend but nothing happened between you two because you were both shy.. will it be diffcult for the guy to forget this girl he really liked? Or will he move on easily?
Of course. I'm sure many would like to think that girls are naturally better but statistically it's about the same.
Regarding shy people. I think it's generally more difficult for guys to move on from a love interest. Supposedly they take about 10x longer to properly get over a partner some studies saying 3-4x others saying they never *really* get over a girl *completely.* I think this is going to have some correlation with crushes. Although you could argue that guys tend to put a lot of effort reigning themselves in and don't feel those affects unless they've fallen for a girl, not just like her aesthetically.
The thing about this is that girls think that girls are more loyal and guys think that guys are more loyal.
And from my personal experience guys are more loyal, I've never cheated in my life but I've been cheated on twice. The unfortunate truth is that people cheat, and it's not tied to your sex it's tied to what kind of a person you are.
For me if I develop strong feelings for a girl, she will become the one and only for a good period of time. Loyalty won't be a struggle, I'll have no choice.
That said, as a caveat I usually need to do something very, very intimate with a girl to develop that level of feeling (usually sex).
I don't "crush". It takes a lot more for me to develop feelings for a girl that just exchanging some friendly conversations here and there and a lot on her part to show that wants me just as much as I want her.