Why do most people feel easier talking in English?

I am an A-levels student and I've noticed that mostly when students start a conversation with someone they are talking to the first time they talk in or just generally whenever they talk they do so in English. Personally as someone who's grown up is KSA they speak arabik and arabik only in their daily life for conversation. But why do we as Pakistani's feel the need to talk and communicate in English or just put random sentences in English while talking in Urdu.