Why is first love always special like even after dating other girl and breaking up with her I don't know why but I am missing my first love so much?

Now I have become a chain smoker and regular drinker because I am missing her a lot... I know some of you might say come on talk to her... But I don't know it will be easy like I seen her... She is totally happy ig after leaving me... It's been 2 years we broked... I don't miss my recent ex but the first girl i fell in love still now... What to do I am messing up my health also?

Why is first love always special like even after dating other girl and breaking up with her I don't know why but I am missing my first love so much?
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