What's wrong with me if I have never felt completely happy in my relationship and it always feels like sth is missing?

My boyfriend is not much affectionate towards me. He and his words give me the vibes like I'm not much important. I'm mostly unhappy in this relationship and find myself complaining. Is there sth wrong with me?

What's wrong with me if I have never felt completely happy in my relationship and it always feels like sth is missing?
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