Disclaimer: people are complicated. I sorta have to project to answer and I dont know exactly what causes your jealousy.

I used to get a lot more jealous. I used to think that I was the right partner for someone and that they were making a mistake by being with someone else. I kinda justified it with this half baked empathy that wanted the girl to be happy, but didn't accept her as an intelligent person that can navigate and choose a partner for herself.

My jealousy was rooted in a bit of a superiority complex. I needed to accept that there are a lot of good people out there just trying to find a partner. That I'm not better than them.

I think it is fine to have feelings for a girl, its also fine to be disappointed when they don't reciprocate. No need to try and not feel those feelings. I think it is a big ask to try and control our romantic attraction, but we can manage how we respond to it.

Though again, what if I'm wrong and maybe this stems from an attachment issue yk? I'm over here projecting. Hope this helps anyways.