I can't picture myself in a relationship ever!

I seem to suck when it comes to dating and even women in general. I'm 23 and have never had any sort of experience with any girl. I just can't see myself having a relationship. Like, I can't see myself in reality ever being in a relationship. I can't picture a girl ever falling in love with me or even wanting to date me, or even find me remotely attractive or desirable.

Does anyone else feel this way? What could be the cause of it?
I can't picture myself in a relationship ever!
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