I got some more crushes again and can't stop thinking about them 😭. Why do i crush on every pretty women so easily all the time?

As i will be going for MBA after graduating college soon, I started taking classes for it too to prepare for exams to get into MBA and in the class I got crush on about 2 or 3 girls. They are very pretty and they initiated convo with me by saying hi and their name and we did shake hand too. This was the first time I did shake hand with a girl. I am 22 and those girls are also about 22-24 year olds and I already got crush on them and always thinking about them since yesterday 😭😭. Today also they tried to talk with me during break time but I am still kinda shy near girls in person so we didn’t talk a lot and one of them told me not to be so introvert as I have to socialize properly. Yesterday I tried messaging one of them on whatsapp as I am in the class whatsapp group too but i deleted the message because I got scared thinking what if she gets angry. I also like this 19 year old girl with whom I had been chatting on Instagram since 28th May 2023 and even though we are in different colleges now( we used to be in the same school), her college is very near to my home and I really wanna ask her out too. I also like my childhood friend Aishu who is 21 turning 22 soon. Even though her replies are very slow, she didn’t reject me and actually agreed to meet up but idk when and I definitely wanna meet her too. Why do I crush so easily on women?