There is this tightness in my chest and it's not going?

So I started dating a guy and it's been 2 years almost , I dated for the first time and this is his 2nd time. in the beginning of first year he gave me everything, attention love affection, replied instantly, always got texts of good morning etc and we went to dates he was eager to meet me everyday and would come to pick me up , was curious to alse questions, everything felt so perfect. now it's a 2nd year and although we he calls like 3 times a day , but somehow I don't know something feels missing now , he never texts me morning texts now , we go whole day without texting each other even if I do , he replies late even if he's online, and we used to sleep like taking to each other at one time. now i sleep early and he's active on WhatsApp his last seen is always after midnight. and one more thing he is lone child , he has lots of females friends cusns etc whom he talks calls etc. I don't know if it's all normal or i clearly don't understand what's missing. we never have deep convos he never asks me questions about me. I don't know whether he's gotten comfortable or losing interest or just keeping me for comfort. can you guys tell me what should I do? I am highly sensitive introvert i overthink a lot and I don't know what should be done?

There is this tightness in my chest and it's not going?
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