Why would a guy show interest in me when he is not over his ex yet?

Anonymous
so I met this guy and it was attraction at first sight for both of us. I was really interested in him so I asked him out, he said we could be friends. I said oki after a few month I persisted for a date. Since we were going no where I blocked him, later on when I unblocked him, he got angry. soon I found out that he was not over his ex yet, then why showing interest in me?
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+1 y
I have been patient with him for 1 year and still he won't leave her...
Why would a guy show interest in me when he is not over his ex yet?
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