Why do I get jealous over a girl even though I don't want to be with her at all?

 No, "aisle" is not the only word in English in which "ai" stands for the /aɪ/ sound. There are many other words, such as:

aisle

ail

aim

air

bait

brain

chair

claim

fair

gain

mail

main

pain

pair

rain

sail

stair

train

wait

This is just a small sample of the many words in English that use the "ai" digraph to represent the /aɪ/ sound.

It is important to note that the English language is full of irregularities, and there are many words that do not follow the general rules of pronunciation. For example, the word "said" is pronounced /sed/, even though the "ai" digraph would normally be pronounced /aɪ/.

The best way to learn how to pronounce English words correctly is to listen to native speakers and practice speaking the language yourself.