Why am I craving this?

Why am I craving a relationship... It's not even like I'm after sex or something, I just want to have someone that I can love... To do all the "cute" couple things like shopping or dressing up and going out for dinner dates etc and I know all relationships aren't like that but I've been seeing people just be a lot happier in relationships yet I'm here at 23 years old and been single since I was like 16/17... I obviously must be doing something wrong
Why am I craving this?
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